Check out AT&T's Valentine's Day Gift Guide for ideas & deals on the new Samsung Galaxy S23!
Protect yourself online
tecprimenet's profile

Contributor

 • 

1 Message

Monday, August 17th, 2015 9:59 PM

How do we get this port unblocked?

Installation Address: [edited for privacy – please do not post personal information]

 

104.10.16.80/29   need port 25 OUTBOUND mail port unblocked.

 

104.10.16.83/29 is attempting to send mail OUT from clients residing at above address.

 

Port 25 is timing out rather than sending mail out.

 

port 25 is reachable on hosted email server (From the internet it is reachable)

alt1.aspmx.l.google.com 25

 

From the IP space 104.10.16.80/29 is it NOT reachable.

 

my thoughts

Employee

 • 

20K Messages

7 years ago

Port 25 is blocked by default due to SPAM....

 

Regular support does not work with this issue, you will need to use ConnecTech, a billable service to have your request fulfilled or use the standard 465 or 587, both require SSL.

 

http://www.att.com/esupport/article.jsp?sid=KB401570

 

https://buy-connectech.att.com/ctcomm/home/index.jsp?_requestid=146582

Tigereyze209

Professor

 • 

3.9K Messages

7 years ago

nbound.att.net / 995

outbound.att.net / 465

 

 

Those are the settings you need to use for your mail haldling program.

 

ATT's settings are non-standard, but they do work.

 

use 465 instead of 25..  should function, no problem.

Not finding what you're looking for?
New to AT&T Community?
New to the AT&T Community? Start by visiting the Community How-To.
New to the AT&T Community?
Visit the Community How-To.