sometimes exim status shows its up and running, but emails can't send/receive, in this case while checking exim logs from sever , it shows the below log :
root@server [~]# tail -f /var/log/exim_mainlog
socket bind() to port 25 for address (any IPv6) failed: Address already in use: waiting 30s before trying again (9 more tries)
to resolve this issue, fire the below script :
root@server [~]# /scripts/eximup --force
It will take 2-3 minutes to upgrading exim mail server with new configuration.
Done..