Started having trouble sending messages from apache after upgrading to a newer version of sendmail. It works fine sending and receiving messages over the internet from remote machines.
Tested sending email from command line as standard user:
# sendmail -v email@example.com <<EOF
Warning: .cf file is out of date: sendmail 8.12.6 supports version 10, .cf file is version 9 (BTW I know this is not latest version!)
firstname.lastname@example.org... Unrecognized host name hotmail.com.
/home/user/dead.letter... Saved message in /home/user/dead.letter
It seems as if it is failing to lookup DNS entries properly. I have tried nslookup and this seems to work fine. What is strange is that it works fine for remote emailing but not for local users.
Please help sendmail gurus!!