SUMMARY: unable to connect to mail server

Thank You to all how responded: Will, Mike, Brian, Michael

Some ISP filter port 25, all users that were having a problem were using AOL
or Earthlink. The easiest way to fix the problem was to setup users with
VPN.




Original question:
> I am having a problem where users outside our network are unable to send
> mail off or our server - error "unable to connect to mail server." Users
> outside the network are using dial-up accounts and Microsoft Outlook.
> I thought this might be a relay problem, so I added a users IP to the
access
> table, told it to relay, makemap hash, and then restarted mail. The user
is
> still unable to connect.
>
> They are able to receive their mail (POP or IMAP) but they cannot sendmail
> off of our server.
>
> I am using the program dracd and this program was working for a while.
> "DRAC will allow users who successfully authenticate via POP3, (ie.  check
> their mail) to relay through your mail server for a preset duration,
> currently a default of 30 minutes.  After the authentication part of a
> successful mail check, the POP3 daemon calls the dracauth()function to
> update an internal database with the originating IP address of the user.
> Each time a relay is attempted, sendmail will consult this same database
to
> verify permission."
>
>
> I am also trying to use SMTP_AUTH, from the sendmail.mc:
>
> dnl define(`confAUTH_OPTIONS', `A p')dnl
> define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN
> PLAIN')
> TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
>
> when I telnet localhost 25:
> 220 red.cmsmechanical.com ESMTP Sendmail 8.12.8/8.12.8; Mon, 26 Jan 2004
> 09:25:38 -0500
> ehlo domain
> 250-red.cmsmechanical.com Hello red [127.0.0.1], pleased to meet you
> 250-ENHANCEDSTATUSCODES
> 250-PIPELINING
> 250-8BITMIME
> 250-SIZE
> 250-DSN
> 250-ETRN
> 250-STARTTLS
> 250-DELIVERBY
> 250 HELP
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