Andrew
A lot of large ISPs are implementing port 25 filtering. The ISP provides
their own mail servers and they want all users to go through those mail
servers. This is to prevent relay raping of mail servers. IMHO, this is a
necessary evil.
If port 25 filtering is implemented, you can either change the port you are
listening on (but Imail won't listen on more than one port, scewing up
normal mail delivery) or have everyone use the Web messaging interface.
I believe you are an IMGate user, so you could also do SMTP AUTH on your
postfix box (postfix shouldn't have a problem running on more than one
port). You need to install CYRUS SASL and compile support for that library
into postfix. Then you can setup PAM (pluggable authentication modules)
with a RADIUS module that can auth against your RADIUS server.
So, solutions:
1) Web messaging (easy)
2) postfix/cyrus sasl/pam/radius (longer but doable)
**********************************
Wayne Smith, CNE/MCSE/CCNP/CCDP
Computer Resources (http://www.cros.net)
----- Original Message -----
From: "Andrew P. Kaplan" <[EMAIL PROTECTED]>
To: "IMail_Forum" <[EMAIL PROTECTED]>
Sent: Monday, February 19, 2001 2:21 PM
Subject: [IMail Forum] unable to send mail through ATT connection
> My goal is to allow customer to use MY mail server regardless of how they
> connect to the Internet. However, it appears that some providers will
block
> SMTP traffic that doesn't orginate from their servers. Example an ATT user
> can use SMTP auth to connect to my IMAIL server but cannot send mail. If
he
> connects through Earthlink using the same email settings he is able to
send
> mail. So ATT is the problem.
>
> Another user is having the same problem sending through MSN. Below is the
> error message. However, he said it was working last week. Any ideas.
>
> >>
> The connection to the server has failed. Account: 'Kevin Dowd (Office
> Account) ', Server: 'mail.cshore.com', Protocol: SMTP, Port: 25,
> Secure(SSL): No, Socket Error: 10051, Error Number: 0x800CCC0E
> >>
>
>
>
> Andrew P. Kaplan, CNE, MCSE+Internet, MCT, CCNA, CCDA
> CyberShore, Inc. -- Premium Internet Services -- http://www.cshore.com
>
> --- To understand recursion, one must first understand recursion.
>
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