<html><head><style type='text/css'>body { font-family: 'Times New Roman'; font-size: 12pt; color: #000000}</style></head><body>The way we solve this problem is running cronjobs across the maillogs, looking for the reject messages for the various domains we care about. Usually we make this an email to our abuse team, but I'm sure once you get the "does it work?" result, it could easily be changed into a passive nagios check report. -- Jason Faulkner Lead Systems Engineer iContact Corporation ----- Original Message ----- From: "Justin Maloney" <justinm@honeycomb.net> To: nagios-users@lists.sourceforge.net Sent: Monday, March 24, 2008 2:47:12 PM (GMT-0500) America/New_York Subject: [Nagios-users] SMTP check <style>  </style> <div lang="EN-US"> <div class="Section1"> Anyone know of a way to test mail through-put with out sending an actual message? The SMTP plugin doesn’t care what it gets for a reply so you don’t know if the server would have accepted the message. Basically I want to check every few hours if Hotmail, Yahoo, Google, MSN, etc. will accept messages from my various mail servers with out having to get accounts on each and clean up messages. Since a lot of these companies don’t use open DNSBL lists I hopped someone else would have run into it. Thank you, Justin Maloney Systems Administrator Honeycomb Internet Services 612.617.0007 </div> </div> </body></html>