These are some commands to check if your mail queue flooded with mails.

To see how many mails are in the queue:

exim -bpc

To get some more details about the queued mails:

exim -bp

The first line contains the length, the size of the message (2.9K), the unique local identifier, and the message sender. The recipients of the message are displayed on subsequent lines.

The exiqsumm utility is a Perl script which reads the output of exim -bp and produces a summary of the messages on the queue:

root@localhost# exim -bp | exiqsumm

To check what exim is doing actually:

exiwhat

To be continued...