Originally Posted by jackd1000
I have an OEL 5 host that is sending mail to a relay host succesfully. The box is working as intended : I am able to send mail to users using (in my case) mutt.
The problem is I don't know why ! I haven't configured the relay host address in sendmail.mc and recompiled. The sendmail.cf entry for "DS" is null.
Where is the system picking up the IP/DNS address of the relay server from ? I can't seem to find it anywhere. This is an issue as we need to change our IP range in the next few weeks
It may not be your sendmail at all, but rather your mutt configuration. The muttrc file can contain IMAP/POP definitions, login, etc., so just by using Mutt, it can connect to another mail server. Another option may be that, while you have sendmail INSTALLED, your system may be USING postfix. Is that possible??
Shots in the dark...