Exim

exim is a popular mailserver. You can use the exim command to administer, get info from, and other interactions with the exim mailserver.

exim -Mvh messageID show email header for the specified message

exim -Mvb messageID show the body of the email

exim -Mvl messageID show the logs for the specified email

exim -bpc show the number of e-mails in the queue

exim -bp show the e-mails in the queue

exigrep grep for mail logs

Example:

exigrep spam@psygen.org /var/log/exim_mainlog