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). 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. I really have no idea what the problem is. Possibly something with my domain name? Does my fedora box "know" that the mail is really for it? If so, where does it put it. I might switch to postfix, but I feel like I am close. Thanks again everyone, Shane
