[ale] Sendmail and dial in users

[Joe Steele]

This may or may not be relevant to your specific problem.  Earlier this year Mindspring began blocking their dial-up customers from establishing outgoing TCP connections to SMTP port 25 except when the destination IP is one of their SMTP mail servers.  See http://help.mindspring.com/modules/01400/01424.htm.

--Joe

-----Original Message-----
 From:	Matthew Brown [SMTP:matthew.brown at cordata.net]
Sent:	Sunday, December 05, 1999 12:16 AM
To:	cfowler at linuxiceberg.com
Cc:	ale at ale.org
Subject:	Re: [ale] Sendmail and dial in users

Christopher Fowler wrote:

> I have a sendmail server adn I would like my users to be able to use it as a
> SMTP server when they dial into mindspring.
>
> I have only a few domains in /etc/mail/access
>
> Is it possible to allow them to relay if the 'MAIL FROM:<USER at WHATEVER.COM>'
> is listed in /etc/mail/access as:
>
> USER at WHATEVER.COM                       RELAY
>
> I tried this but it seem to deny relay when I did the below:
>
> telnet mailserver 25
> helo whatever.com
> mail from: <user at whatever.com>
> rcpt to: <user at awayfromhere.com>
> ---- RELAY DENIED
>
> Is it possible to do this with sendmail?

I have had _tons_ of trouble getting this to work with MindSpring in
particular.  I'd love to hear the answer.  The obvious problem is that anyone
who figures this out could easily use your server for spam by sending all
messages to your server marked as a user.

-Matthew