I tried using the mail command on one of our Linux machines to send email, and it works fine. I tried using the same command on another one of our Linux machines, and it didn't work (no error message was returned either).
The machine that works has the following version information:
esgbuild@bbox003:/etc$ cat /proc/version
Linux version 2.6.12 (root@Knoppix) (gcc-Version 3.3.6 (Debian 1:3.3.6-7)) #2 SMP Tue Aug 9 23:20:52 CEST 2005
esgbuild@bbox003:/etc$ uname -a
Linux bbox003 2.6.12 #2 SMP Tue Aug 9 23:20:52 CEST 2005 i686 GNU/Linux
The machine that does not work has the following version information:
root@masterd:/opt/automate# cat /proc/version
Linux version 2.6.18-6-686 (Debian 2.6.18.dfsg.1-23etch1) (firstname.lastname@example.org) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Fri Dec 12 16:48:28 UTC 2008
root@masterd:/opt/automate# uname -a
Linux masterd 2.6.18-6-686 #1 SMP Fri Dec 12 16:48:28 UTC 2008 i686 GNU/Linux
Can anyone tell me where I might look to see why the one machine can't send email? What configuration files I might want to look at, or what packages are installed or not installed? Thanks.