smtplib_verify.py

#!/usr/bin/env python


import smtplib

server = smtplib.SMTP('mail')
server.set_debuglevel(True)  # show communication with the server
try:
    rfmonk_result = server.verify('rfmonk')
    notthere_result = server.verify('notthere')
finally:
    server.quit()

print 'rfmonk  :', rfmonk_result
print 'notthere:', notthere_result