Error :
LOG: retry_defer MAIN
==email@******.com R=lookuphost T=remote_smtp defer (-53): retry time not reached for any host
To Resolve this you should:
/usr/sbin/exim_tidydb -t 1d /var/spool/exim retry > /dev/null
/usr/sbin/exim_tidydb -t 1d /var/spool/exim reject > /dev/null
/usr/sbin/exim_tidydb -t 1d /var/spool/exim wait-remote_smtp > /dev/null
/scripts/courierup — force
/scripts/eximup –force