I'm trying to setup sendmail on my centos 7 server, but it's failing for some reason. I've opened port 25/tcp on firewall-cmd and selinux is disabled as well. It's still not working... /var/log/maillog logs:
Jul 25 14:14:34 mail sendmail[12274]: u6PBEYlI012274: [email protected], size=101, class=0, nrcpts=1, msgid=<[email protected]>, relay=root@localhost
Jul 25 14:14:34 mail sendmail[12275]: NOQUEUE: tcpwrappers (localhost, 127.0.0.1) rejection
Jul 25 14:14:34 mail sendmail[12274]: u6PBEYlI012274: [email protected], [email protected] (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30101, relay=[127.0.0.1] [127.0.0.1], dsn=5.0.0, stat=Service unavailable
Jul 25 14:14:34 mail sendmail[12274]: u6PBEYlI012274: u6PBEYlJ012274: DSN: Service unavailable
Jul 25 14:14:34 mail sendmail[12274]: u6PBEYlJ012274: [email protected], delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31125, relay=[127.0.0.1], dsn=5.0.0, stat=Service unavailable
Jul 25 14:14:34 mail sendmail[12274]: u6PBEYlJ012274: u6PBEYlK012274: return to sender: Service unavailable
Jul 25 14:14:34 mail sendmail[12274]: u6PBEYlK012274: to=postmaster, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=32149, relay=[127.0.0.1], dsn=5.0.0, stat=Service unavailable
Jul 25 14:14:34 mail sendmail[12274]: u6PBEYlJ012274: Losing ./qfu6PBEYlJ012274: savemail panic
Jul 25 14:14:34 mail sendmail[12274]: u6PBEYlJ012274: SYSERR(root): savemail: cannot save rejected email anywhere
Thanks to @Andrzej A. Filip's answer i'm now getting this in the logs:
Jul 25 17:26:00 mail sendmail[3812]: u6PEPxur003812: [email protected], size=102, class=0, nrcpts=1, msgid=<[email protected]>, relay=root@localhost
Jul 25 17:26:00 mail sendmail[3813]: u6PEQ0Bs003813: from=<[email protected]>, size=347, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1]
Jul 25 17:26:00 mail sendmail[3812]: u6PEPxur003812: [email protected], [email protected] (0/0), delay=00:00:01, xdelay=00:00:00, mailer=relay, pri=30102, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (u6PEQ0Bs003813 Message accepted for delivery)
But the mails are still not coming to destination...
Your sendmail seems to use tcpwrappers. tcpwrappers seem to reject email connection to 127.0.0.1:25.
Such connections are used to pass email submitted via sendmail command to local sendmail daemon.
FIX:
Inspect and fix tcpwrappers configuration files: /etc/hosts.allow and /etc/hosts.deny.
Collected from the Internet
Please contact [email protected] to delete if infringement.
Comments