Can't send POP mail past modem firewall

AT&T DSL internet with Actiontec GT701D modem.
With the modem's internal firewall enabled (and at any security level), Mail can't send POP account messages. It just sits at "Connecting to server...". Mail, however, can receive messages.
This may be a modem problem (waiting for an answer from Actiontec), but was wondering if anything can be done in Mail to get around it.
Thanks!

Your ISP (AT&T) is blocking the SMTP port for all servers except their own. Port 25 is the standard SMTP port that is used to send mail, and AT&T wants you to use only their SMTP server. This has nothing to do with your modem.
My domain provider offers a different port number (2525) to connect to my domain's SMTP server. I use this to get around the blocked port 25 business.
You have 2 options... 1) Use the AT&T provided SMTP server, or 2) contact your mail domain's admin and see what other ports they support for SMTP.

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HT1277 I have quickbooks software. I am traveling. I tried to send an invoice out, using the mac email (version 5.3) I can't send the mail out. I get a pop up asking for my password, I put the password in and it does not accept it.

I have quickbooks software. I am traveling. I tried to send an invoice out, using the mac email (version 5.3) I can't send the mail out. I get a pop up asking for my password, I put the password in and it does not accept it. This is the 1st time I've had this problem.
slpmtns

Whilst it may not be your fault I am afraid it appears that your post is on a forum which is not the best for your OS. It will save the time of the unpaid volunteers here, and may resolve your issue faster, if you could examine the list below and see if there is a more appropriate forum to which you could direct your question.
OS X 10.9 Mavericks
OS X 10.8 Mountain Lion
OS X 10.7 Lion
OS X 10.6 Snow Leopard
OS X 10.5 Leopard
OS X 10.4 Tiger
OS X 10.3 and earlier
OS 9, OS 8 & System 7
OS X Technologies
OS X Server
iPad
iPhone
iPod
Other

Can't send e-mail w/new POP settings...

Hi, all,
I updated my POP & SMTP settings as demanded by Verizon and I now can't send e-mail from one of my subaccounts. I get the error message:
An error occurred while sending mail. The mail server responded: 5.7.1 Authentication is required to send mail as <r******[email protected]>. Please verify that your email address is correct in your Mail preferences and try again.
I don't use that e-mail address, which I guess is the "technical" address I got when I signed up. The address I'm trying to use is s******[email protected], and that's the e-mail address that is set up in the account on my e-mail program (Thunderbird). I never use the address the error message is referencing.
Any suggestions on how I can fix this most annoying problem?
Thanks!

Without seeing your settings, it's going to be somewhat difficult to guess the problem. I would take another look at your SMTP (outgoing) settings, and verify that the server is set to authenticate with the correct username and password.
If a forum member gives an answer you like, give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem.
"All knowledge is worth having."

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non sequitur wrote:
I'm not sure I know what you mean by 'what settings are you using in the accounts part of mail preferences', but I'll give you as much information as I can in the hopes that some of it is responsive.
In "preferences" I select "accounts" and there are 3 listed:
'personal gmail' (IMAP)
'business gmail' (IMAP)
'Yahoo' (POP)
For each of the above, the "Account Information" tab gives:
description: [username]
email address: [correctly reflects my address]
full name: [my name]
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user name: [my username]
password: [*** - I've re-entered to ensure it is my true password]
outgoing mail server (SMTP): smtp.gmail.com:username
Is it all in the same format on the iphone?
This is the same information for the 2 gmail accounts, with the exception of the usernames differing. If I click "server settings" at the bottom, it reflects the outgoing mail server "smtp.gmail.com" server port 25, my correct user name and password.
Again, different names for the different accounts, right? And this is the same port etc. as you put into the iphone
All of the above information matches what I input into my iPhone, and it has worked fine since day 1, so I don't understand the malfunction.
Open /Applications/Utilities/Console. Make sure console.log and system.log are open (or see the File menu).
Try to send an email.
Look for new lines in the log files (it should scroll down automatically so the newest lines are at the end of the log at the bottom of the window). What do you see? (Erase or substitute for any personal info before posting.)
Do you use any firewall software or have you used third-party software or Terminal to configure the builtin firewall?
- cfr

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Hey there mikeneiris,
It sounds like you are not able to send any emails because the account is showing as offline. I recommend these steps from the following article to help you get that going again:
Mail (Mavericks): If a mailbox is offline
http://support.apple.com/kb/PH14925?viewlocale=en_US
To take an account online, click the lightning bolt icon. Or choose Mailbox > Online Status > Take [account name] Online, or Mailbox > Take All Accounts Online.
If you can’t take an account online, make sure you’re connected to the Internet. If a warning icon appears after the account name, click it for more information.
Use Connection Doctor
Some mailbox names can appear dimmed if you don’t have permission to access them, such as “public” mailboxes on a server, or if the mail server is unavailable.
Thank you for using Apple Support Communities.
All the best,
Sterling

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Have you made the changes they have been recommending for most of the year?
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See OS X Mail: Troubleshooting sending and receiving email messages for details. on troubleshooting mail.
Your SMTP server settings are incorrect. Mail has two connections, a receive path from your mail server to your mail client, and a send path from your mail client to the mail server. The send path uses SMTP to communicate with the server.
Apple Mail.app has separate settings for the receive and send paths; each has its own server, username, password, port and SSL settings. Your send path settings are likely incorrect.
To determine the proper settings, check with Yahoo for the SMTP server settings for your account (usually a web search, but I don't know the details of how Yahoo sets up their accounts by default nor whether that varies by account), and verify that your settings match — the send-path settings are available via the accounts settings; Mail > Preferences > Accounts > select the account > Account Information > and switch the Select SMTP Server setting to Edit SMTP Server List... > select your Yahoo SMTP server, and set the account details per Yahoo requirements.

I can't send yahoo mail(SMTP)using a Mac?

I can't send yahoo mail(SMTP)using a Mac?

Listen I do not have any problem with the I cloud at all. When its come to setting up the..... Outgoing
mail serve (smtp) for yahoo I have tried every thing even I changed any other settings in my email accounts.
But doesn't responds. Just some one tell me please for yahoo account what should I put for Server Name and
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I believe do something wrong here . Is all of
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smtp.mail.yahoo.comI..
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Until earlier today (for two days only) I couldn't send either. I was advised to run Keychain Access First Aid which spotted "Item “pop3.freezone.co.uk” is a duplicate; this item's port attribute is not set" and then repaired it (Freezone is the name of my ISP). Now I can send Mail but not receive.
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I tried swapping the plist file for an older version from a backup of my system. That didn't work either.
I'm tearing my hair out! Any suggestions?

No.
I'am sendig email from domain A using SMTP belonging to domain A.
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Can't send e-mails to hotmail-accounts!

Dear volunteers,
Since a few days I can't send e-mails anymore from my Thunderbird account to hotmail-users. Everytime I receive a "mail delivery failed" notice. Can you help me?

Thank you for your message!
This is the exact text of one of the failures:
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Can't send POP mail past modem firewall

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