This remote plugin send an email and return 1 if successful or 0 if not. It support MTA Auth, and custom PORT.
-h SMTP Server IP address
-d Destination email
-f Email of the sender
-a Authentication system, could be LOGIN, PLAIN, CRAM-MD5 or DIGEST-MD
-o SMTP Port (25 by default)
-u user (only if MTA auth required)
-p password (only if MTA auth required)