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Port 25 - Things to know from AT&T

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Port 25 - Things to know from AT&T

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Port 25 Blocked

Port 25 is blocked over AT&T internet. The reasons for this is to provide a more secure internet connection and reducing the amount of spam and viruses that come through Port 25. It is estimated that 80% of the e-mail traffic carried on the network is spam. Spammers have become increasingly sophisticated and go to great lengths to cover their tracks and send countless e-mails flooding your inbox and the internet.

 

Getting around the Port 25 Block

If you use port 25 to send E-mail, there are a few options to get around this block.

  • Configure your mail server to use a different port. Many mail servers no longer use port 25, and it may be best to get the changes made to move away from port 25.
  • Verify your E-mail address. Once you verify your third party E-mail with the AT&T mail servers, E-mail through that mailing address will be allowed to travel through the AT&T mail servers. To do so:
    1. Log in to your online mail.
    2. Select the gear icon in the upper-right corner of the page, and select Settings.
    3. Select Writing email.
    4. In the Add send-only address field, enter the email address you'd like to add.
    5. Select Verify. A verification message will be sent to the email address you entered.
    6. Select the verification link in the message to verify your account.
      Writing Email Settings.png

David, AT&T Community Specialist

AT&T Customer Care

Need help with an account specific question?  Post a new question here on the forums by clicking the "Ask a Question" button.
For additional support, please visit us at our AT&T services hub.
Follow us on: Twitter @ATTCares and @DIRECTVService

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
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‎10-18-2017 11:05 AM

Re: Port 25 - Things to know from AT&T

Learn more about AT&T Network practices.

 

David, AT&T Community Specialist

AT&T Customer Care

Need help with an account specific question?  Post a new question here on the forums by clicking the "Ask a Question" button.
For additional support, please visit us at our AT&T services hub.
Follow us on: Twitter @ATTCares and @DIRECTVService

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
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Contributor

Re: Port 25 - Things to know from AT&T

I started having email problems about 2 weeks ago from my iPad and iPhone. It will work fine for part of the day and then I will get an error that says: account error: bellsouth. The mail server imap.mail.att.net is not responding. When I put my password in it doesn’t accept it however if I go to a pc and go to att.net and sign in it works. The att store employee told me to delete my account and read, which I did but am still having the problem every day for a portion of the day. How do I resolve this?

 

Message 3 of 5
Contributor

Re: Port 25 - Things to know from AT&T

My att.net email started not working yesterday afternoon, I will not let me sign into my account with what I know is the correct email and password, what do I need to do to fix this? 

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ACE - Expert

Re: Port 25 - Things to know from AT&T

@Bcandrews and @Jennifer2018 please start your own threads or post to a more appropriate thread than this one.  Your problems are completely off topic and unrelated to topic of this thread, i.e., the reasons port 25 is blocked.  There are many current account problem treads (unfortunately) to choose from but yours might stand out if you just create your own individual threads. 

 

Just a suggestion.

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*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
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