Fixing Sendmail

If Sendmail is not behaving as expected or hangs during installation, it might be because FQDN is not set.

Perform the following steps:

  1. Set an FQDN for your Photon OS machine.

  2. Run the following commands in the order below:

     echo $(hostname -f) > /etc/mail/local-host-names
         cat > /etc/mail/aliases << "EOF"
             postmaster: root
             MAILER-DAEMON: root
         cd /etc/mail
         m4 m4/cf.m4 >
         chmod 700 /var/spool/clientmqueue
         chown smmsp:smmsp /var/spool/clientmqueue

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