ICal/Mail Issue - To Do's Causing Mail to Send Duplicate Messages

When I set a To Do (either in iCal or by selecting text within a mail message) that is associated with one of my IMAP mail accounts, Mail generates hundreds of duplicate messages that end up in my "Apple Mail To Dos" folder on my IMAP server. I only see one copy of the To Do in my reminders (in Mail) and only one shows up in my To Dos in iCal, but literally hundreds of the same message are sent to my IMAP server.
Any thoughts on why this is happening?

After completely wiping my system clean, and (FINALLY) completely sync'd to .Mac, everything seems to work fine.

Similar Messages

Mail issues on iOS 8 (unread mail, accidental deletions)

Hello,
ever since I updated my iPad 4 to iOS 8, I have had problems with my mail app. I hoped that it was a glitch and that updates would fix it, but now I'm on 8.1.2 and things remain the same. Here's what is troubling me:
The new unread e-mails in "All inboxes" are shown in parentheses behind each folder on the Mailboxes screen. (Same is true for the top left "Mailboxes" link while I'm reading an e-mail on landscape orientation.) Now, while the e-mails themselves lose the little blue dot as soon as I open an e-mail, the parentheses-marker remains the same, signalling to me that there are unread e-mails. Or rather: As I flip through my unread e-mails, all but one are registered as read. In the end, the top left corner always still says "Mailboxes (1)" even when I've read all e-mails. The only way to get rid of that "(1)" is by selecting another read e-mail. Then it disappears.
When swimping e-mails to lefts to reveal the options menu, half the time I don't even get far enough t reveal the red "delete" button before the e-mail is deleted automatically. I hardly dare swiping important e-mails to the left anymore because they might be deleted accidentally. (This is particularly annoying if I want to flag an e-mail.)
Rarely, but often enough to bother me, the mail app crashes while typing or reading an e-mail.
These are enough problems to make me ask for help. Would resetting the network settings help? Does anyone else have these problems? It's all involving the Mail app. Should I switch to a third party mail app instead?
Any help is much appreciated. Thanks,
Nils

I have the exact same issue! Works smooth as butter on iOS 8.1 but not Yosemite... I'm running the pre-seed beta Yosemite update which supposedly fixes some Exchange issues but it hasn't fixed this one!
Exchange remains unusable for me in Apple Mail in Yosemite...

Lost all settings for Mail, setting up new account causes Mail to crash

Not sure if this problem is related to a recent archive and install or the recent 10.4.8 update, but a user's email on my G5 apparently lost all her mail, settings, etc. When Mail was clicked on, a series of new account windows appeared, which I filled out with the relevant info, but when i clicked Done, I get the prompt: A keychain cannot be found to store "user's name." It gives me the option to set to default or cancel. When I click on cancel, a summary of all the relevant info appears in a window, but when I attempt to open Mail it always crashes. Not sure where to go from here?
We have another computer (G3) running 10.3.9 with her Mail app working. Is there any way to transfer or import her Mail app to this computer?

Nol longer relevant since updating to Leopard.

More Apple Mail Issues

We have been using Apple Mail at our school for some time with few problems. We use it as the link to an outside POP3 service. Recently, as with so many other users, we have begun to have serious issues with crashing, loss of messages and issues with both sending and receiving at times. A new one has developed now. Disk Warrior was run recently and seemed to have had decent results. Upon closer inspection, it has apparently altered the modification dates of many user files and folders, as well as mail files (all to the same date: April 1, 1976). Now with mail, users are finding the message: 'The message from <[email protected]> concerning "(subject") has not been downloaded from the server. You need to take this account online in order to download it.' The account is already online. I'm not sure if this is a result of the Disk Warrior intervention, or if it is a continuation of Apple Mail issues, or both. Also, users click on one message, and another displays. If you scroll through your messages, continuous crashes occur, and sometimes all messages disappear. Fortunately, with our mail service (Gaggle), we can retrieve messages directly online.
The issues do not occur in Entourage, and I am testing a couple of other mail applications as well. So it is definitely an Apple Mail problem. I have tried many of the fixes I have seen in other posts, but with no success. Running Disk Utility or Tech Tool has no effect. Our solution for now is to just not use Apple Mail - which our users are use to.
I will be curious to see what solutions come out. This is a serious issue for many users.

Apple doesn’t routinely monitor the discussions. These are mostly user to user discussions.
Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.
Mail Feedback
Or you can use your Apple ID to register with this site and go the Apple BugReporter. Supposedly you will get an answer if you submit feedback.
Feedback via Apple Developer

View Duplicate Messages in Apple Mail 7.3 in Mavericks

Hello,
Up till at least OS X Lion, if there were duplicate email messages, there would be a blue link in the header of the message in Apple Mail that you could click on to reveal the duplicate messages.
Im currently running Mavericks and Apple Mail 7.3.
By default, there no longer seems to be any indication that there are duplicate messages?? Is that correct???
I have found the Terminal commands that will allow me to "ungroup" duplicate messages:
To disable automatic grouping of duplicate messages, quit Mail then run this command in Terminal:
          defaults write com.apple.mail AlwaysShowDuplicates -bool true
To revert to the default setting, run this command:
     defaults write com.apple.mail AlwaysShowDuplicates -bool false
or simply delete the setting altogether with this command:
          defaults delete com.apple.mail AlwaysShowDuplicates
If you want to see how Mail behaves with this setting enabled, but without modifying your preference file, start Mail from Terminal with this command:
          /Applications/Mail.app/Contents/MacOS/Mail -AlwaysShowDuplicates YES
These seem to work fine as far as listing the duplicate messages in the message list.
HOWEVER . . .
What I am wondering is . .
Is there no way to leave the duplicates "grouped" so there is only single entry in the message list BUT have the link in the header that indicates that there are duplicates and allow you to click on that link to reveal the duplicates in the message list???    I find having the link in the header easier to work with rather than having ALL of the duplicates ungrouped in the message list.
ALSO - for what it's worth:
I also tried setting the "Show Header Detail" option in Mail Preferences to "Custom" which includes an entry called "Duplicates" in the list of times displayed in the custom header but I still do not get any indication (that I can see) that there are duplicate messages . . .
Any ideas or experience with this????
John

https://discussions.apple.com/thread/4045156
http://support.apple.com/kb/HT4863
http://support.apple.com/kb/TS3276
http://support.apple.com/kb/PH8200
Maybe some of these might help, hope. I had as imilar issue, I deleted my mail and recreated it.

MAIL IS EATING SENT MAIL AND SENDING DUPLICATES

hi-
i've been having MAJOR mail issues. the biggest are .mac mail is eating my sent email - they just disappear into thin air - never to be found again.
and i've noticed there are duplicates - 2, and sometime 4 of the same email sent out.
i am using the mail.mac.com as incoming and outgoing server. i have sbc global as my dsl. i've called applecare numerous times and sbc. they cannot figure it out.
can someone please help me sort this out?
thanks so much
rainey

well...that's the tricky part. sometimes it eats my mail. and other times it sends out duplicates.
it tends to do this if i've just sent an email and i go into my sent box shortly after, all of a sudden it'll show up and then poof - disappear.
other times if i'm not looking at what i've sent i'll ocassionally look in sent box and notice there are 2, 3 and sometime 4 dups sent to the same person.
these are just 2 problems of the MANY that i've had with email.
also when i have a disc in my drive (say scrabble game) my minimize options disappear...
i'm all jacked up.
any advice on any is greatly appreciated.
a friend thinks my box is corupted b/c i started it when i was still operating on panther and when i upgraded to tiger problems started.
thanks
rainey

How can I prevent Mail from applying actions (moving/copying/flagging/marking read) to duplicate messages?

I use Mail to check multiple accounts. When I receive the same e-mail in multiple accounts, actions applied to an e-mail in one account often (though not always) affect duplicate messages in other accounts.
Example 1
Someone sends an e-mail to both me and my wife. Mail is set up to check both accounts. If I open the message in my Inbox, it marks it as read in my Inbox as well as in my wife's Inbox.
Example 2
For historical reasons, I have chosen to have all my e-mail forwarded (by the server) to a second account, to be used essentially as an un-touched archive of all incoming mail. If I manually move a message from my main account Inbox to another mailbox, the destination mailbox will end up with 2 copies, one from my main account Inbox and the other from the "un-touched archive" Inbox (which has obviously now been altered unintentionally).
Does anyone know of a way to prevent this behavior. I can manage my own duplicates. I don't want Mail to do it for me.
(Btw, I already have the "AlwaysShowDuplicates" option set using "defaults delete com.apple.mail AlwaysShowDuplicates")

There are certainly many ways of organizing things so that Mail never has to deal with multiple accounts and duplicate messages (separate user accounts, separate computers, separate mail clients, etc., etc). That's just not what I was asking. I'd like to know how to fix Mail's behavior when it does have to deal with multiple accounts and duplicate messages.
I was hoping there might be another hidden preference or something (and by the way my original post should have said "defaults write com.apple.mail AlwaysShowDuplicates -bool true", instead of the "defaults delete ...")

Mail re-sends old messages

old messages (~6 months) get re-sent???

My mail application is completely screwed up: it
re-sends old messages to people and it's becoming a
HUGE problem. It's completely random but it happens
at least once a day. I'm also having trouble with
attachments -- i often can't open them (even though
it's just a file or something).
I would like to trash the application and just
re-install it. Does anyone know how to do this?
The easiest way is to use a program called "Pacifist." It allows individual packages to be installed. Just Google the program name and mac and download it. ($20 shareware and totally worth it)
Use your original OSX 10.4 install disk and run pacifist and re-install the mail package using Pacifist. Download any updates (ie: OS X 10.4.5 combined) and repeat the process with the updated mail application included in the combination package.
You will now have a fresh, current install of mail.

TS3276 I need feedback for the following issue. When I send email from this 27 inch iMac, the computer adds a string of characters in vertical column that represents the QWERTY key board, all alpha numeric characters are included. Yahoo mail, issue only o

Restating my issue / question...
When I send email from this iMac, there is a string of characters assigned. The characters are all the "alpha numeric" characters on the QWERTY key board. This only occurs when email is sent from this iMac. The issue does not manifest when using any other lap top or computer.
Hence, I have ruled out the issue is a yahoo mail matter.
Again, I can access the Yahoo mail account form multiple devices and send email without unintended assignment of character strings, but when I send wmail using this iMac, the issue happens everytime.
Characters are stacked verticaly in a column. It looks as if all characters (except function keys) are included in the string.
Any ideas?
GMc

Please read this whole message before doing anything.
This procedure is a diagnostic test. It won’t solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
Third-party system modifications are a common cause of usability problems. By a “system modification,” I mean software that affects the operation of other software — potentially for the worse. The following procedure will help identify which such modifications you've installed. Don’t be alarmed by the complexity of these instructions — they’re easy to carry out and won’t change anything on your Mac.
These steps are to be taken while booted in “normal” mode, not in safe mode. If you’re now running in safe mode, reboot as usual before continuing.
Below are instructions to enter some UNIX shell commands. The commands are harmless, but they must be entered exactly as given in order to work. If you have doubts about the safety of the procedure suggested here, search this site for other discussions in which it’s been followed without any report of ill effects.
Some of the commands will line-wrap or scroll in your browser, but each one is really just a single line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, and you can then copy it. The headings “Step 1” and so on are not part of the commands.
Note: If you have more than one user account, Step 2 must be taken as an administrator. Ordinarily that would be the user created automatically when you booted the system for the first time. The other steps should be taken as the user who has the problem, if different. Most personal Macs have only one user, and in that case this paragraph doesn’t apply.
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
When you launch Terminal, a text window will open with a line already in it, ending either in a dollar sign (“$”) or a percent sign (“%”). If you get the percent sign, enter “sh” and press return. You should then get a new line ending in a dollar sign.
Step 1
Triple-click the line of text below to select it:
kextstat -kl | awk '!/com\.apple/{printf "%s %s\n", $6, $7}' | open -f -a TextEdit
Copy the selected text to the Clipboard by pressing the key combination command-C. Then click anywhere in the Terminal window and paste (command-V). A TextEdit window will open with the output of the command. Post the contents of that window, if any — the text, please, not a screenshot. You can then close the TextEdit window. The title of the window doesn't matter, and you don't need to post that. No typing is involved in this step.
Step 2
Repeat with this line:
{ sudo launchctl list | sed 1d | awk '!/0x|com\.(apple|openssh|vix)|org\.(amav|apac|cups|isc|ntp|postf|x)/{print $3}'; sudo defaults read com.apple.loginwindow LoginHook; } | open -f -a TextEdit
This time you'll be prompted for your login password, which you do have to type. Nothing will be displayed when you type it. Type it carefully and then press return. You may get a one-time warning to be careful. Heed that warning, but don't post it. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.
Note: If you don’t have a login password, you’ll need to set one before taking this step. If that’s not possible, skip to the next step.
Step 3
launchctl list | sed 1d | awk '!/0x|com\.apple|org\.(x|openbsd)/{print $3}' | open -f -a TextEdit
Step 4
ls -1A /e*/mach* {,/}L*/{Ad,Compon,Ex,Fram,In,Keyb,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Spo,Sta}* L*/Fonts 2> /dev/null | open -f -a TextEdit
Important: If you formerly synchronized with a MobileMe account, your me.com email address may appear in the output of the above command. If so, anonymize it before posting.
Step 5
osascript -e 'tell application "System Events" to get name of every login item' | open -f -a TextEdit
Remember, steps 1-5 are all copy-and-paste — no typing, except your password. Also remember to post the output.
You can then quit Terminal.

Windows Live Sending mail Issue

Hi Team,
As I can't able to send mails to more than 50 recepients on a single go. I'm getting this error
Subject '*************'
Server: 'smtp.gmail.com'
Windows Live Mail Error ID: 0x800CCC0B
Protocol: SMTP
Port: 25
Secure(SSL): Yes
I changed the Port to 587 and 465 but no result. Please help me out how to tackle from this situation

That error ID indicates that the destination is busy, rather than you've reached the recipient limit. Gmail seem to have multiple limits depending on method of sending, but from what I can see in this instance the recipient limit would be 100 rather than
50 so that's not your issue.
Most common cause for that error is local anti-virus / firewall software causing issues. There's a thread discussing the same issue here
http://answers.microsoft.com/en-us/windows/forum/windows_vista-networking/error-code-0x800ccc0b-when-trying-to-send-email/31dce8ff-7b1a-4b25-b3bf-eba5eccabd29 and includes a few troubleshooting steps, but the main initial one is to disable any AV software
you have installed on your machine temporarily and try sending again. If that works then it's definitely the AV software causing the problem, and configuring it to no longer scan outbound mail may resolve it, depending on the AV software you're using.

Yahoo Mail issue, able to recieve but not send.

I sold my friend my Macbookpro running 10.5.3 and he is able to receive emails but not send them even though the MBP makes the sound like the email was sent. Yahoo says they are not reaching their server. I told him to repair disk permissions which may be a long shot and if that did not work to add a new user account and re setup the email account over again and see if they go out from there. Any other suggestions would be appreciated. I know I have had this issue before but it was just because my outgoing mail server was not typed in properly.
He says everything is correct. Could it be a port issue?

Please see if the Apple mail troubleshooting support article resolves this misbehavior.
Sending is the SMTP path, which is the one that nobody new to mail can find — mail uses POP or IMAP for receiving, and SMTP for sending, and there are separate settings, servers and login credentials for each. To get to the SMTP settings, Mail > Preferences > Accounts > select the failing account > Account Information > select Outgoing Mail Server (SMTP) to Edit Mail Server List > select the SMTP account > verify the settings for the server, that SSL/TLS is enabled (usually) or not (rare), and that your username and password are correct. Like the POP or IMAP settings, these SMTP settings and credentials are also specific to your mail ISP, which means I don't know exactly what the required settings are here.
With the way that mail pops up that infernal "do you want to cause yourself grief by changing your password?" dialog box on transient network errors, it's very easy to get an incorrect password set, too.
I'm not sure why you've listed web server, Linux, Apache and PHP in your posting.

Smart group causes Mail to crash

I created a smart group that immediately caused Mail (3.6 (936)) to crash (apparently).
Since, I have been unable to launch Mail normally - it starts with the smart group in question selected, and then crashes, I need to force quit it.
I have tried to launch Mail with shift pressed down. It starts, and works, up to the moment I select this smart group. I can modify it, and perform delete command, but this is never executed, Mail crashes... Any suggestions?

hmibrooklyn I tried and failed to get Mail to crash by following what you described. Until someone else has anything more constructive to add I suggest the following, in no particular order. Try each suggestion and determine if any one of them keeps Mail from crashing.
Try copying the text from Pages, but instead of pasting it select Paste and Match Style from Mail's Edit menu before formatting it as a numbered list.
Before composing the message select Make Plain Text from Mail's Format menu.
If you have more than one Mail account, perform the same action using a different Mail account.
Open Font Book - it's in your Applications folder. Select All Fonts from the Collections column, then select any of the fonts in the adjoining column, then Select All from the Edit menu. Then, select Validate Fonts from the File menu.
The end result ought to resemble the following screenshot. If it does not, report any errors it encounters.
Create a new, temporary User account to determine if the problem exists while using it instead of your usual one: Isolating an issue by using another user account
You will have to configure a Mail account for the temporary User account, but you can use the settings from the existing Mail account.
Delete the temporary User account when you are finished with it.
That's all I can think of for now.

Server Mail Issues

*I posted this in the 10.5 forum initially, my apologies
**Update, I tried from an outside network to add the account to an Outlook 2003 PC and it started to receive emails as normal, then stopped at the mentioned date below (August 26), just as the other Mac's did at the office. The only computer that it has successfully sent all messages to and continues to receive is my MacBook Pro (OS X 10.5.4).
Hi,
This is one of my first times posting on this forum, I'm hoping that someone might be able to help with the odd issue we're having . At our office we have a Mac OS X 10.3.x server with our email hosted on it (among other things). We have two computers in the office that have an information account ([email protected]) in Apple Mail (Mail 2.0). They, up until about three weeks ago, were receiving new emails to that account just fine and there were zero issues. However, since August 26th, emails will not come in. We can send emails to it and they do not bounce back, in fact we can log onto the webmail interface with the server and all messages are there.
This got me to thinking, so I decided to add the same account to my MacBook Pro (OS X 10.5.4) and Apple Mail (3.4). Upon doing so I received all 3,000+ messages that were on the server (same exact settings). After completing this, I decided to try and a PowerBook that another employee uses. I added the account, saved, then it said it was fetching 1 of 3,000+ messages. At about 968 it skipped to "Indexing files" and then completed with just 968 of the emails, just up until the date that the other computer stopped receiving them (August 26). I tried to remove/add on the initial computer having the issue, same exact result. I tried rebuilding the mailbox on both machines, again same result.
It's interesting because we all connected to the same server with the exact same settings, on the same network, the only difference being the Operating System/Mail version. Has anyone ever had an issue like this? Is there any way to essentially clear the cache of the workstation and maybe that new fresh connection to the server will yield more positive results? Any help is extremely helpful, our office is about to get terribly busy and we hope to get this issue remedied quickly. Thanks so much in advance for your advice!
Mike

Mike,
I'm no expert (I know mail clients but not mail servers very well), but it sounds to me like there is a corrupted message inside the mail store on the mail server. That would explain why certain clients or versions of clients can download the mail and some can't, its possible that they handle corrupted data differently.
Are you using IMAP or POP to access the mail server?
One thing I would try: if all the machines that fail to download mail from the server fail at August 26th, I would log into a working interface (probably webmail) and delete all messages from August 26th. I would think at this point doing a database rebuild would mean losing a large chunk of your emails. I had that problem before with 10.3 server.
You could also restore the mail database from a backup before August 26th. If you do that, you'll lose any of the emails that came in after then, but if you are using IMAP (which I suspect you are), you could copy those messages over to your local 10.5 system, then copy them back after the mail database is restored.
Another possibility (IMAP only): when you setup a new account, before you actually try to download the messages, in the setup on the 'Advanced' tab, it says "Keep copies of messages for offline viewing:" set this to "Only messages I've read". That should force mail to download the IMAP headers only, not the full message text.
One last thing: if you're using POP and leaving messages on the server, I find this often causes problems with mail clients. Perhaps switching to IMAP is a better model for your setup.

Mail Version 2.1.3 port 110 incoming mail issue

I have 25 macs that all have the same issue, mail goes offline. I have checked with my ISP and my mail server companies and they say that the equipment and setting are fine. I took off the firewall from the network and hooked directly up to our T-1 line and we are still getting the same thing. I tried to remove the possible causes, but we are going through with outbound mail, internet and VOIP. It remains a mystery why the Incoming mail goes offline by itself. I changed the IP coming into our T-1, we have 5 available IP's, that worked for about 3mins. I used Terminal to telnet out to our mail server and this is the message I get:
*Last login: Wed Jul 29 12:32:08 on console*
*Welcome to Darwin!*
*You have new mail.*
*Tech-support:~ kw$ telnet mail.xxxxxxxxxx.com 110*
*Trying xxx.xx.xxx.xx...*
*Connected to xxxxxxxxx.com.*
*Escape character is '^]'.*
*Connection closed by foreign host.*
*Tech-support:~ kw$*
Does anyone have any ideas why my machines would be doing this since Friday July 24?????

Hi nancyjane,
Not certain, but this can fix myriad Mail problems...
Safe Boot from the HD, (holding Shift key down at bootup), it will try to repair your Disk Directory while the spinning radian is happening, so let it go, run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, then move these folder & file to the Desktop.
Move this Folder to the Desktop...
/Users/YourUserName/Library/Caches/Mail/
Move this file to the Desktop...
/Users/YourUserName/Library/Mail/Envelope Index
Reboot.

Mail Issues since maverick upgrade

Since upgrading to Mavericks I have been having the several issues with Mail. The are as follows:
Scrolling is available intermittently or not working at all (using Magic Mouse)
Problem: Scrolling works for a while when using mail, then stops working. I have to click on the side bar to go up and down on all scroll screction within mail. This issue only resolves when quitting Mail, and sometimes will only work again when shutting down and restarting my iMac.
Scrolling on folders withing the main body of my iMac also stop working from time to time and only resolves when force quitting finder, or restarting my mac (or somethime shutting down and restarting the mac).
Email address pull down menu does not close down
Problem: When typing an new email and selecting an outgoing address the pull down menu appears, but once an address is chosen using the mouse curser the pull down menu remains on screen and does not close down automatically. I can not close it with teh mouse curser and have to use the keyboard (return or tab buttins) to close down the drop down address menu. It used to close down prior to Maverick upgrade. The pull down menu remains on screen blocking access to the CC and Subject sections.
Saving Mail attachments to desktop folders does not work.
Problem: Saving attachements from mail does not work at all using the drop down menu within mail. The process of using the save attachments menu within mail seems to work, but when you go to the folder after using this process, the item or items have not been saved.
Click and drag is the only way to move attahcements from mail to desktop folders now.
Mail will not quit automatically when shutting down Imac
Problem: When shutting down my iMac, mail will no longer quit automatically and prevents the shut down. Once shut down has been selected, Mail will no longer quit and I have to use Force Quite to shut it down.
Would welcome suggestions on how to resolve these issue.

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of steps 1 and 2.

ICal/Mail Issue - To Do's Causing Mail to Send Duplicate Messages

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