Checking a server for "test" email accounts

Test email accounts are typically a security vulnerability. Originally made with an initial purpose of testing, many times with a weak or insecure password and then forgotten about. Regularly checking your server for test@domain.tld email accounts is a great security precaution.

Find "test" email accounts on cPanel servers.
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1)Login to your server via SSH as the root user.

2)Copy and paste this nifty one line command into the terminal:

grep -i 'test' /home/*/etc/*/passwd | awk 'BEGIN { FS = "/" } ; { print "test@" $5 " email address exists!"}'

3)If any test email accounts exist, you should see output similar to this:

grep -i 'test' /home/*/etc/*/passwd | awk 'BEGIN { FS = "/" } ; { print "test@" $5 " email address exists!"}'
test@test.com email address exists!

4)You can search for other possible email aliases, such as "testing@domain.tld" instead of test by replacing 'test' with 'testing' in the one liner.