Error using m4 macro while building sendmail.cf from sendmail.mc on RHEL 6 / CentOS 6 flavors?
[root@cent1]# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
m4:/etc/mail/sendmail.mc:10: cannot open `/usr/share/sendmail-cf/m4/cf.m4': No such file or directory
[root@cent1]#
The above error is because the package sendmail-cf is not installed.
You will have the below error messages on the /var/log/maillog file also.
sendmail[3215]: gethostbyaddr(10.0.3.15) failed: 2
sendmail[3215]: NOQUEUE: SYSERR(root): No local mailer defined
sendmail[3215]: NOQUEUE: SYSERR(root): QueueDirectory (Q) option must be set
The above error is because the sendmail.cf is not configured properly.
Fix is to install the package sendmail-cf, build sendmail.cf from sendmail.mc and restart sendmail service.
Install the sendmail-cf
# yum install -y sendmail-cf
Comment the entry which makes the sendmail listens only to loopback address as below by adding "dnl" on /etc/mail/sendmail.mc
# vi /etc/mail/sendmail.mc
dnl # DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
# service sendmail restart
Check if sendmail is started properly.
[root@cent1 ~]# netstat -tulnp | grep -i :25
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 3748/sendmail
[root@cent1 ~]#
Hope this helps.
Jk
