Can't send mail on Comcast accounts

I have turned on servers, entered all info. Correctly. Every time I try to send an email, the message comes back that i have not entered my password. It has been entered numerous times. Same problem on iPad. Any suggestions?

also contacted Comcast. They suggested I download their app for email. Finally looked into Comcast forums and got some info. I did a bunch of stuff so not sure which one helped.. I made sure password was typed into smpt outgoing. From setting tap mail, then tap smpt and there will be a place to put password. Next I took the advice from forum and worked on my email account. I had 12,000 (no kidding) emails in my inbox. I got rid of all spam, unneeded stuff and put all the rest in a temporary folder. That seemed to so do the trick. I can now send emails.
In the Comcast forums there are also screen shots to show you exacly how to configure email for iPhone 5, though it seems the same for iPad, etc.
Hope this helps.

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Sending mail using Comcast Account

Hi Guys,
I am pretty sure I've set up the mail account on the Iphone right. Problem is that I can't send mail. It tries but then says:
Cannot connect to "smtp.comcast.net"
Help!
Thanks,
Andy

Hello. Posted below is some info you can check on your end.
Go to Settings-Mail- Tap on your account- Go to Advanced.
incoming uses SSL needs to be "ON"
Outgoing uses SSL needs to be "ON"
Authentication needs to be selected for "Password"
How do I check my Comcast email on my iPhone?
You can setup your iPhone to check your Comcast email accounts by entering your Comcast account settings directly on your iPhone.
If this is the first account you??re setting up on iPhone, select Mail. Otherwise, from the Home screen choose Settings > Mail > Accounts > Add Account.
Under the email account type section choose Other.
Select POP as the server type and enter your account information.
Your email address: [email protected]
The email server type (POP)
Incoming mail server: mail.comcast.net
Outgoing mail server: smtp.comcast.net
Enter your username and password. Your username is the part of your email address before the @ symbol.
You may need to add your username and Comcast password to the Outgoing server settings. Where it says optional. Type username as your full email address. followed by your email password below.
let us know how this works
Message was edited by: Andrew T.

Can´t send mail on any account

Hi,
Suddenly all of my accounts can´t send mail...
it pops up a window saying mail can´t use this smtp, and it doesn´t matter what I choose for selected server, nothing works.
And if I change the outgoing mail server settings in preferences it does not change in the pop up.
I did not change anything.
I have tried to start new account but nothing works.

Gunz,
For your .mac account, if you are using the smtp.mac.com as the Outgoing Server, change the Port to be Port 587, and test. Although you are using many different venues, more and more ISPs are blocking Port 25 for all but their own SMTP. Are the other accounts unrelated to your ISP? If so, their SMTP may need to be presented either on Port 587, or still another.
If you are having a problem with the SMTP provided by your ISP, then a change in policy may have been accompanied by a new name for their SMTP, or a new Authentication protocol.
More info, please, but first test with Port 587 and the smtp.mac.com.
Ernie

Can't send mail in IMAP accounts after installing Mavericks. Incoming messages OK.

I'm unable to send mail in IMAP accounts after installing Mavericks. Incoming is OK. Any suggestions on how to resolve, please?

I'm afraid that I have the very same problem. How did Apple not see this. Surly email is a major part of any opperating system and should have being more than double checked before releasing. I understand software glitches but this is a major pain in the backside. I'm totally stuck and can't use my macbook pro

Suddenly can't send mail with Comcast.

Just thought I'd add my experience to the chorus. Use Mail on a G4 PB running latest version of Tiger with Comcast as ISP. Few days ago kept getting the message that port 25 timed out. I questioned Comcast, and got a standard reply to try port 587, which I did, and which works. I can now send mail through port 587.
Question though: Is this a Comcast problem, or an Apple Mail problem. It seems like it cannot be a coincidence that "can't send mail" seems to be a hot topic all of a sudden, and that it involves various ISP's and platforms. I haven't heard the word "virus" mentioned.

In my mind, it's a silly attempt by ISPs to limit/cut off SPAM, not that that is a silly idea in and of itself, but changing the Port number isn't going to last very long, add to that not notifying Users/Paying customers before hand is negligent if not criminal!
The Spammers probably knew and adjusted to the change before the first Customer figured it out.

Can't send mail to POP Account which has attachment or signature

Since installing the Update 10.4.6, I have been unable to send email to my pop account which has either a signature or an attachment (when there is no attachment or signature it works fine). I have cleared the caches using tiger cache cleaner. I have tried adding a new user account to mail. It doesn't work in Entourage either. I've reinstalled Mail. What else do you recommend?
Prior to installing the update, mail worked great for over a year!
Additional Information:
Whenever I press the send icon, the mail message disappears, then in the activity viewer it gives the message “Delivering message / Sending data (28% done) and hangs there for a long time and finally gives the following message:
Cannot send message using the server XXX
Use the pop-up menu below to try a different outgoing mail server. All messages will use this server until you quit Mail or change your network settings.
Whenever I send an email with text and a signature, the activity viewer it gives the message “Delivering message / Sending data (100% done) and hangs there for an extremely long time and finally gives the same message.

Mario_MM wrote:
For sending mail the POP server is not important what you need to check are the settings of the SMTP server. Verify the settings of the SMTP server again and compare it to your settings on your iMac.
Checked SMTP settings and they are identical to the working iMac. I had not changed any settings on my MBP when it stopped sending, plus it did work briefly last night with those settings, so I don't see how it could have anything to do with my settings being incorrect.
The only thing even remotely different that I did prior to this happening was to use it away from home. I was out of town and used someone else's wifi to send some emails, but can't see how that should matter. It was the same ISP that I use at home, so I never even had to change settings for remote access. I never touched a thing, but when I got home I could no longer send emails.

Brand new macbook pro can't send mail through verizon account

Hi,
I just bought a 13 inch macbook pro, 750 gb hard drive I7 processor. I can receive mail, but can't send it through my verizon account. My mobile me account works fine. Everything looks right but it just won't send. Any ideas?
thanks,
Joe

I had the same problem since last Thursday. I have tried and re-tried all of the settings suggested by the support posts but I can not get email to go out of me Outbox.

Can't send mail to .Mac accounts

I saw this problem posted before but the answer didn't solve it for me. I don't have a .Mac account but I use pop mail for my email from my web-based email. Every time I send to a [email protected] address, I get the following message from "Mail Delivery Subsystem" (charles is an example @mac.com address)
The original message was received at Thu, 6 Sep 2007 09:46:33 -0700 (PDT)
from smtpout09-04.prod.mesa1.secureserver.net [64.202.165.17]
----- The following addresses had permanent fatal errors -----
<[email protected]>
(reason: 550 5.1.1 unknown or illegal alias: [email protected])
(expanded from: <[email protected]>)
----- Transcript of session follows -----
... while talking to smtp-bounce.mac.com.:
DATA
<<< 550 5.1.1 unknown or illegal alias: [email protected]
550 5.1.1 <[email protected]>... User unknown
<<< 554 5.5.0 No recipients have been specified.
Reporting-MTA: dns; mac.com
Received-From-MTA: DNS; smtpout09-04.prod.mesa1.secureserver.net
Arrival-Date: Thu, 6 Sep 2007 09:46:33 -0700 (PDT)
Final-Recipient: RFC822; [email protected]
Action: failed
Status: 5.1.1
Remote-MTA: DNS; smtp-bounce.mac.com
Diagnostic-Code: SMTP; 550 5.1.1 unknown or illegal alias: [email protected]
Last-Attempt-Date: Thu, 6 Sep 2007 09:46:35 -0700 (PDT)

This is only a guess, as there is no host "smtp-bounce.mac.com": your mailserver smtpout09-04.prod.mesa1.secureserver.net is currently listed at least at one blacklist service (take a look here http://tqmcube.com/cgi-bin/rbltqm?ip=64.202.165.17 to verify) as a spammer.
I am not sure about the technology Apple uses to prevent SPAM, but it technically would be possible to check for listed servers before establishing a connection and saying "HELO" with a faked hostname (smtp-bounce.mac.com in that case) and bouncing all mail.
The second possibility is, of course, that the given error "User unknown" is correct, and the user imply does not exist.
Try figuring this out by sending mail to .Mac users using an alternative mail provider or SMTP-server.

Can not send mail with google account

I have the Ipad in the 3G model but I am unable to send mail using my google account that is linked to it. If I was to go on the internet on it and send things through google it would let me but I need to be able to send attchments off the ipad so need to be able to use the mail app. I keep getting a message saying Cannont send mail the sender address was invalid. Please help

I am having alot of trouble with my ipad(3G) and mail using gmail push set up using exchange server. It seems like every couple days it will not send mail and says unknown recepient or invalid. Then the next day it will work. I've deleted and set up the email account a few times. Same thing happens. If I just use a normal non push gmail account that works fine, but I'd like the gmail push to work. I have a strong wireless signal when this happens.
Any ideas?
thx
lenn

I can't send mail with IMAP account

I have two accounts set up on my iPad, a POP account and and IMAP account. I can send emails on the POP account ok but not from the IMAP account. It is a new email address and I could send emails from it but now it has stopped sending. It says the recipient was rejected by the server or the sender was rejected by the server. No settings have been changed.
Any ideas?
Many Thanks

i think to see al the Sent mailbox present both in the main section both in the imap tree. (see pictures from http://www.pv.infn.it/~bellomo/archivio/Picture%201.png and http://www.pv.infn.it/~bellomo/archivio/Picture%203.png) i've tried to change and use any of the Sent folder as Mail Sent folder from menu, i can change them but trying to send a mail always leave the Sent folder without messages.
Notice that a couple of mails have been copied to Sent folder .... but others not: is so strange !!!
I've tried just after one mail was copied and get the other one not ...

Can't send mail through business account

Hi. I'm using Mail to consolidate various email accounts, and have been having trouble making one of them work.
The connection doctor says it's online and the hosting company for the website says I have the right settings, but it just seems to keep giving me this error message:
And then I have to send it through a different account, which is all sorts of frustrating, as well as debilitating to the business image.
the smtp outgoing setting I was told to use is mail.pepcrealfood.co.uk, which the doctor says is online, as I said. And now I'm being advised to talk to my service provider about it. Any help available out there?

I had the same problem since last Thursday. I have tried and re-tried all of the settings suggested by the support posts but I can not get email to go out of me Outbox.

Can't send mail, says all accounts are offline...

I have been trying to send emails all day, and for some reason it is not doing it. It says that my accounts are offline, and when I run Connection Doctor, it won't fix anything at all! AHH!! I don't know what to do at all, I have 5 different accounts, and none of them work. My firewall is not the problem, and I don't know what to go from here.
It used to work, I installed Leopard last week, and everything was fine until now.
Message was edited by: Vyrtue77

You need to provide more information. What kind of email (POP or IMAP)? What is your network configuration like? Can you access other online resources? Is your email available via the web, and if so, can you get to it now?

User "null" with comcast SMTP, can't send mail with Mail 3.1

it was kind of off and on, now seems permanent. When sending mail via comcast SMTP, the following error is returned: P*lease enter the password for user “(null)” on SMTP server “smtp.comcast.net”*
The mystery is how user got to be "null". Deleting the account and redoing it doesn't help. Changing port to 25 and 587 don't work. I get mail fine, just can't send. Yes, my user name is actually filled in on the accounts page. Gmail works fine...
Thanks

wierd...
blanked out my username, but Mail insists on having a username. So on a lark I put back my username with the @comcast.net domain and it worked (one test message anyway). I left the password filled in 'cuz I hate having to fill my password in every time.
So thanks for joggling the idea bank!

HT204075 I am not receiving mail to one of my email accounts. I can send mail from this account and all other accounts seem to be working.

I am not receiving mail to one of my email accounts. I can send mail from this account and all other accounts seem to be working.

Is this work email account on a BES server?
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Can't send mail out of my iPad and iPhone using my office work mail account.

I can't send mails out of my work mail account on IPad or iPhone. I usually get error message that the server does not accept relay messages. I only get this problem on IOS devices only but on other platform I don't . Please can anyone help fix this?

Hi there Stonecold2323,
You may find the troubleshooting steps in the article below helpful.
iOS: Troubleshooting Mail
http://support.apple.com/kb/ts3899
-Griff W.

Can't send mail on Comcast accounts

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