FWD: monit 5.4 violating smtp protocol

[Len Conrad]

---------- Original Message ----------------------------------
From:  "Len Conrad " <address@hidden>
Reply-To:  <address@hidden>
Date:  Wed, 22 Aug 2012 16:34:22 +0200


I have several monit 5.4 with their mailserver set to mx1.domain.com

mx1 runs postfix's postscreen and is dropping the monit smtp clients with

"PREGREET 20 after 0"

that's "after 0 seconds", meaning monit smtp client is connecting to port 23 
and immediately starts sending, when it should wait for mx1's SMTP greeting.  

That's why the log line is a PREGREET violation. 

The "20" means mx1 received 20 characters before mx1 could send its SMTP 
greeting.

As a result, we aren't getting monit alerts and will have to whitelist all the 
monit IPs so the pregreet filter doesn't drop them.

Len