To get details on how exim treats an email issue the followig command

exim -bt -d+all test@gmail.com

To get minimized result, ie for a quick check if the mail server process the email id fine, isssue this.

exim -bt test@gmail.com

How to find our issue with the first command. When running the above commnad if t throws the following error somewhere, check the /etc/resolv.conf file and set proper nameserver entries.

host_find_bydns yield = HOST_FIND_FAILED



Sample outout of the second command

root@raptor [~]# exim -bt test@gmail.com
test@gmail.com
router = lookuphost, transport = remote_smtp
host gmail-smtp-in.l.google.com [74.125.91.27] MX=5
host alt1.gmail-smtp-in.l.google.com [74.125.79.114] MX=10
host alt2.gmail-smtp-in.l.google.com [74.125.39.27] MX=20