Change queue lifetime

If mails are not flowing, check mail logs. If the majority mails are getting deferred, then reduce the queue lifetime.

Add 'OTimeout' at the end

vim /home/openemm/bin/mailer.sh - (line 60)
$sm -q1m -NNEVER -OQueueDirectory=$BASE/var/spool/QUEUE -OPidFile=$run/sendmail-openemm-queue.pid -OTimeout.queuereturn=360m