A quick troubleshooting top for Unix and Linux Mail

I’d like to point out a helpful troubleshooting tip I found relating to troubleshooting email problems in Linux and Unix systems
http://www.mysysad.com/2006/12/on-number-of-occassions-i-have-used.html

Roy suggests using the mailx -v command to generate a vebose output for troubleshooting, this helped me track down a mysterious bug with our patron notification emails.