Thanks everyone for the great help with my problem yesterday! You were of course correct. I have modified sendmail.mc to use DaemonPortOptions=Port=smtp, Name=MTA and my server now accepts connections on port 25!
So if I telnet from our internal networks exchange server to my fedora box port 25, I get an connection from sendmail.
But I'm still having some strange problems. When I try to send mail to my fedora box, I never seem to receive it. I have tried sending mail to root@xxxxxxxxxxxxxxxxxxxxxxx or bb@xxxxxxxxxxxxxxxxxxxxxx (which is an account on the server).
Does your Fedora box call itself mylinubox.mydomain.com? If not, you'll need to tell it to accept mail for that domain, by adding a line:
mylinubox.mydomain.com
to /etc/mail/local-host-names and then restart sendmail.
If I run tcpdump I see our exchange server connect to deliver it. And it appears to? Here's a small sample:
08:35:18.666064 IP (tos 0x0, ttl 127, id 20657, offset 0, flags [DF], proto 6, length: 52) exchange.mydomain.com.smtp > mylinuxbox.46818: F [tcp sum ok] 130:130(0) ack 7 win 64234 <nop,nop,timestamp 26319854 149656531> 08:35:18.666424 IP (tos 0x0, ttl 64, id 44455, offset 0, flags [DF], proto 6, length: 52) mylinuxbox.46818 > exchange.mydomain.com.smtp: F [tcp sum ok] 7:7(0) ack 131 win 5840 <nop,nop,timestamp 149656533 26319854> 08:35:18.666719 IP (tos 0x0, ttl 127, id 20658, offset 0, flags [DF], proto 6, length: 52) exchange.mydomain.com.smtp > mylinuxbox.46818: . [tcp sum ok] 131:131(0) ack 8 win 64234 <nop,nop,timestamp 26319854 149656533>
But I never see anything in /var/spool/mail/ for root or bb.
Looking in logs, nothing in /var/log/message. /var/log/maillog shows entries for when I send mail out from my box (that works). But no entries are made when my exchange server tries to deliver mail to me.
Try increasing the log level. Add:
define(`confLOG_LEVEL',`13')dnl
to your sendmail.mc file, rebuild sendmail.cf and restart sendmail.
See what happens when you manually send mail to your box using telnet (>>> is things you type, <<< are responses from sendmail):
$ telnet mylinubox.mydomain.com smtp
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
<<< 220 mylinubox.mydomain.com ESMTP Sendmail 8.13.1/8.13.1; Wed, 27 Oct 2004 13:49:45 +0100
>>> HELO test
<<< 250 mylinubox.mydomain.com Hello exchange.mydomain.com [127.0.0.1], pleased to meet you
>>> MAIL FROM:<me@xxxxxxxxxxxx>
<<< 250 2.1.0 <me@xxxxxxxxxxxx>... Sender ok
>>> RCPT TO:<root@xxxxxxxxxxxxxxxxxxxxxxx>
<<< 250 2.1.5 <root@xxxxxxxxxxxxxxxxxxxxxxx>... Recipient ok
>>> DATA
<<< 354 Enter mail, end with "." on a line by itself
>>> To: <root@xxxxxxxxxxxxxxxxxxxxxxx>
>>> From: <me@xxxxxxxxxxxx>
>>> Subject: Test Message
>>>
>>> Test
>>> .
<<< 250 2.0.0 i9RCnjsf025836 Message accepted for delivery
>>> QUIT
<<< 221 2.0.0 mylinubox.mydomain.com closing connection
Connection closed by foreign host.
Paul.
