SMTP authentication to mail relay on ATT DSL

[btietz]

This past week the AT&T Internet Service Provider has changed policies regarding mail relaying through their network.

I need help configuring Zimbra to authenticate with the AT&T mail relay (I have to use their mail relay in order to send out SMTP email over the Internet).

Since Zimbra doesn't have any place in the Admin GUI for login credentials to the AT&T mail relay, I know I need to hit the command line...

I know at least someone using Zimbra is using AT&T's DSL ISP network and must have already figured this out...

Please Help!

[uxbod]

Does this help ? SMTP Auth Problems - Zimbra :: Wiki

[p24t]

That is for authentication at the ZCS end. With ATT DSL, they block outgoing port 25, and force you to use their SMTP as a relay, but it requires auth.

This is one of the reasons I'll probably be dumping ATT and going back to Time Warner. That, and their damn DHCP changes my IP on a _very_ regular basis, and it's very annoying.

[phoenix]

Outgoing SMTP Authentication - Zimbra :: Wiki

[Bill Brock]

I believe AT&T is forcing you to go SSL with port 465 also. They will no longer support non SSL port 25.