Mail cannot send out

Normally I using mail is no problem just last few week the email cannot send out. But receiving still ok. This morning I use iPad recevied, send mail instead of Mail from MacBook.
In the same time I also try to use office mac (outlook) is same receive is ok, cannot send out.
The questions what happend on mail or outlook on MacbookPro? Since iPad, iPhone can using mail (receive, send) is normal.
Angie,

The sever did not changed, if they changed why iPad can send-receive as normal? Only happen on Mac. Last night I try to use office Mac (Outlook) is same receive mail is ok but cannot send out.
What can I do? I should re-install again for office Mac? Or Mail? (how to reinstall mail?)

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HELP! My Office Mail Cannot Send Out Externally!

Hi all, recently I've upgrading/migrating to my new G5 in the office (whopee, finally!) I have transferred all my old data to Mail, settings everything etc, I can send and check email, I can log on to my office intranet and can actually surf the web, the only thing I cannot do is send email EXTERNALLY!!
Help! I have checked and even toggle some settings, e.g. in Mail account, under SMTP, use Authetication/Password etc but still no avail...
Anyone with such similar experience?? Thanks and cheers

Hi, just some updates, I have tried several methods, including the most drastic one by removing out all the Mail folders, data, plist preference files etc, and start Mail anew, creating my office email account from the ground up, and still, I cannot send out email externally - so "proving" my "old" mail data is ok, so I copied them back.
Could it be the SMTP that is causing all these problems?? Our office POP and SMTP settings are in "IP style" numbers addresses, e.g. xx.xxx.x.x
I am trying to get my IT dept to give me a new SMTP, if possible...
Here's another thing I found out when I launch Mail Connection Doctor:
It reported status Green, and Details-Connection and login to server succeeded.
But... Internet Connection Status, RED - Mail was unable to connect to the internet, click the "Assist me..." button for help diagnosing the problem.
When I continue with the diagnostic, it says "Your internet connection appears to be working correctly."
So I guess the office network/intranet has no problem connecting to the internet... but is this affecting Mail's ability to send out email externally??
Cheers

I'm on vacation and using their wi-fi......cannot send out mail tho am able to receive it. Is there something I should be opening. Am new to this and old aged....is my excuse!!

What should I do here. Mail in but cannot send out. Using wi-fi away from home.

Try restarting your iPad by holding down the on/off and the home buttons at the same time until you see the Apple logo.

I cannot send out e mails?

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I cannot send out e mails from my macbook air today but my macbook pro works fine, the settings on both computers are both the same and i have tried 3 wifi spots, i can still receive e mails on my air plus use the internet, skype etc just won't enable me to send out, has anyone had a similar experience and can anyone help?
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Tap Settings / General / Reset / Reset Network Settings.
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Since upgraded phone to 2.0, cannot send out email

I recently upgraded my iphone to 2.0 (mistake!) and now cannot send out email from my iphone. I have tried deleting all my email accounts and re-setting it up on my iphone rather than syncing with my computer but it still will not send out email. I can send out email from my computer and used the same settings for both...

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TS3276 I cannot get my outgoing SMTP server togo "On-Line" and cannot send out emails.

I cannot get my outgoing SMTP server togo "On-Line" and cannot send out emails.

I had this problem too but I fixed it today.
Go to the mail menu preferences.
Click on account in question.
Select the outgoing SMTP mail server (the one offline), this has a drop down list, click on the edit server list.
Click on the advanced button.
Make sure use default port is checked.
Make sure SSL is unchecked (unless your provider requires it, mine does not work with it checked).
Have authentication set to password.
User name should be your email address for that account.
Make sure correct password is entered (for some strange reason my password box was blank on this account).
Push the ok button.
For me the SSL box was checked and the password was missing. This is strange to me considering I have unchecked the SSL Box on the mail preference advance page. Also, I went through the complete set up account when I first created the account, why was my outgoing server password box empty?
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POP3 Business E-Mail CANNOT SEND HELP PLEASE

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Hey all,
If you have your network service providers SMTP server inputted and still experiencing trouble. Then we suggest contacting us so we can gather logs to find the root cause.
Please contact your network service provider and ask to be transferred to BlackBerry.
This will help us resolve this new issue.
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-ViciousFerret
Come follow your BlackBerry Technical Team on Twitter! @BlackBerryHelp
Be sure to click Like! for those who have helped you.
Click Accept as Solution for posts that have solved your issue(s)!

Attachment size - Mail cannot send email attachments over 1.5Mb

Had this issue with Mac mail for well over a year now.
Mac Mail, connected to Exchange server.
Mac Mail cannot send attachments over about 1.5Mb. This does fluctuate, sometimes its as low as 600Kb.
It seems to be related to the internet speed you have, Slower internet connections and attachment size you are able to send goes down, faster speed and it allows bigger attachments to be sent.
Im assuming its some kind of time out issue.
With Windows and Outlook on the same internet connection = NO PROBLEM AT ALL!
This means its not an exchange only problem, its specific to mail and exchange.
I have several friends all switched over to Apple in the last 2 years and ALL having the same issues and despite logging several calls with Apple and trying everything they have suggested still no fix.
I have searched around and it seems lots of people are having similar issues all with no resolution to this.
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@Brooksymj
We had a similar problem - but we had one Mac which had been migrated from and old G5 Tiger to a new Intel iMac Snow Leopard and no problems existed (all size attachments send), so we checked out what was different about that machine's mail.plist preferences. We spotted some obvious ones that didn't exist on a clean install of Snow Leopard, so added them, which worked for us, as follows...
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Ian

Just upgraded to Yosemite 10.10.2 on my iMac 24 inch and now my Suddenlink POP email account won't accept messages. The message says unable to receive Mail and the warning says: Mail cannot send your password securely to the server. You can remove th

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Thanks Csound1. That did work and Mail was able to connect to the internet. Green light status. Is it because of my provider that I may never have had secure connections? Is that an Apple thing or do PCs have the same issues? Appreciate your help. I'll research insecure connections as I am ignorant of the consequences.

Loaded Yosemite onto mid 2011 MacBook Air. IMAP account goes offline - message - Mail cannot send your password securely to the server. Allow insecure authentication doesn't work. Repeated reloads. No joy. Help!

Mail cannot send your password securely to the server. You can remove this restriction in the Accounts preferences by setting “Allow insecure authentication”, which could put your password at risk.

I have the same problem.
Late 2012 imac 27", intel i7 core
When I upgraded to Yosemite, suddenly my email account (netvigator POP) gives an error:
Mail cannot send your password securely to the server. You can remove this restriction in the Accounts preferences by setting “Allow insecure authentication”, which could put your password at risk.
I have shut down & restarted mail, but no success. If I select Allow insecure authentication, it works, but that's not a long term fix.
I also have a hotmail POP account enabled, and that is working fine.
What's happening Apple??
(Long term apple family - iMac, iBooks, TimeCapsule, iPhones, iPads, AirportExpress etc etc)

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I cannot send out text messages - I can receive them - cannot send them to a contact.
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The contact is not blocking me by the way - it is my spouse LOL
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Thanks to draya06 for your response.
Please try deleting all text messages from this person and resend. Do you have a signature on your outgoing text messages? If so please remove the signature and retry. If these don't work please PM me and we will further troubleshoot this issue.
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How do I stop my mail from send out my e-mails with the mobile me acct instead of my default provider? I have checked the "use only this server" in my provider account.

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There is no such option/setting on an iPhone to determine this. Whether you can view the attachment has more to do with your connection, WiFi or cellular, and the size of the attachment than anything else. There will be a paperclip indicating the message includes an attachment regardless if downloaded with the message or not. When connected to the cellular network, if an attachment is below a designated size the attachment will be downloaded automatically. If over a certain size, you must select the attached file icon in the body of the message to download the attachment. The size limit varies by carrier/provider.
Tell her you're gonna leave her out of the Will if she doesn't stop .

Setting up mail. cannot send password securely

when i go to set up my mail with my aol account i get a message saying mail cannot send my password securely to the server. this is on the first welcome screen where you enter your name email and password.....it does give me the option to do it manually but if i do that i cannot send any email but i receive email. i checked the incoming and outgoing settings and there right..... what does this mean is there anyway to get past this
thanks

I've never seen this particular warning, but it's important to note that passwords for e-mail are always sent insecurely unless you are able to connect via SSL. You can set Mail to connect via SSL in the advanced account settings, assuming that your mail provider (AOL) allows such a thing, which some do not. Even if the password is sent encrypted, the rest of the e-mail is not, so you should never send any confidential information via e-mail, any more than you'd put it on a postcard.

I an using a G5 Mac and when I use my AOL e-mail and send out an e-mail I am told that I have been "Black Listed" and I cannot send it.

I am using a G5 Mac and AOL e-mail. I cannot send a message out without being told that I have been "Black Listed"
I can receive message with not problems.

Hello,
To see if it's your provider, What's my ip...
http://www.whatismyipaddress.com/
Start with these three, check SpamCop or SpamHaus to see if your IP is there...
http://spamcop.net/bl.shtml
http://www.spamhaus.org/lookup.lasso
http://www.spamhaus.org/zen/
Sometimes an ISP will bloc a whole other ISP too, if it's the source of too much SPAM.
Might also see this post by Gallomimia...
http://discussions.apple.com/message.jspa?messageID=9465359#9465359
If none of those are it, then report back please.

OSX Mail - Cannot send message using the server ....

Hi there,
Mac Pro with OSX 10.6.
*Can receive mail, but can no longer send email* using the program Mail.
Been getting the popup "Cannot send message using the server [shawmail.vc.shawcable.net] for the past 3 days. I hadn't changed anything about my computer, and have had the Mac for 2+ years. So this just started doing it on it's own.
I had a technical support guy from my service provider even interface with my computer, where he could see my desktop right over the internet, and he couldn't get it fixed either.
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1. Uncheck "Use SSL" (Done that, and it was never checked "on" to begin with)
2. Make sure Authentication is set to none, with no password (done that, and it wasn't set with a password to begin with)
3. Delete [user]/Library/Preferences/com.apple.mail.plist (done that, didn't do anything)
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I can't believe how ridiculous this issue is. i have been searching for days for a solution to this. i have tried EVERY recommendation on these forums and nothing works. It appears that this issue dates back to TIGER. I had this problem back in January and just bagged figuring it had something to do with iweb. I bought a new html program and was able to send out my newsletter last month no problem. Suddenly, one month later- here i am again, unable to send out my newsletter with no help from Apple or verizon, or these forims, or anyone else. To think that a company that I have stood behind and loved so much can't be be bothered fixing such a simple issue that has been going on now through 5 OS's (I am using Lion but I had the issue using leopard as well) is a disgrace.

Mail cannot send out

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