I am still a Cox customer. I was told by their tech support to change the
outgoing SMTP server to my new ISP and leave the incoming one as COX.NET.
Could not get info w/ ATT as to whether I should authenticate the outgoing
server.
Any more ideas?
Cox only allows access to their SMTP message submission server from their IP
network. If you access the Internet from the AT&T IP network, you can't use
the Cox SMTP message submission servers at all.
If you are an at&t Yahoo! HSI customer (most likely guess) have to use
'smtp.att.yahoo.com:465' for outgoing (SMTP) email. Also, they have to
configure the client to use SSL with those servers/ports. See the following
link for more details:
http://helpme.att.net/article.php?item=287
If you want to use both your 'att.net' email *and* your 'cox.net' email, you
will have to configure two accounts. For the Cox account, use:
Incoming email (POP3): {your 'cox.net' POP3 server}
Outgoing email (SMTP): 'smtp.att.yahoo.com'
On the Servers tab, "Outgoing Mail Server section, select "My server
requires authentication", and click on the "Settings..." button.
In the settings menu, select "Log on using" and fill in your full 'att.net'
email address for the Account Name field, and your 'at&t Yahoo! HSI'
password in the "Password" field.
On the Advanced tab, put a check in the "This server requires a secure
connection (SSL) for the "Outgoing mail (SMTP)" section only, then change
the port number to 465 (if that port number is not automatically selected
when you check the box). You only need to do that for the SMTP server on the
Cox account.
On the General tab, you can use your 'cox.net' email address when setting up
the "Cox" account.
When you set up the "AT&T" account, you can just follow the steps in the
Wizard.
In the unlikely event that you are an AT&T Worldnet Service customer, see
the following link for more details:
http://preview.tinyurl.com/39fez2
I only included that because the 'att.net' domain is also used by AT&T
Worldnet DSL Service. Next time, be sure to specify not just your email
domain, but the actual name of your ISP; it will make it easier to point you
in the right direction for help.