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[monit] Alerts and HELO/MessageID hostname issue

From: Athan Dimoy
Subject: [monit] Alerts and HELO/MessageID hostname issue
Date: Thu, 31 Jan 2008 21:30:40 +0000 (UTC)
User-agent: Loom/3.14 (

The host where monit runs ( also hosts my mail server 
( This server is used my monit to send alerts using smtp 
(mailserver Monit is using gethostname() function which 
returns the hostname Next, this hostname is used my monit, both 
as HELO (EHLO) and MessageID trail.

Unfortunately, my ISP, as well as my company mailserver, use a backscatter 
protection that reject monit alerts as forged mail. The reason is, that MX is and that is what is expected as HELO 
message and MessageID trail.

The only solution I've found so far, is to hardcode the desired hostname 
( in sendmail.c.

Could you please consider implementing an additional mailserver entry that 
will allow users to set the exact hostname to be used for HELO/EHLO and 
MessageID generation? For example: "set mailserver with 
hostname with timeout 30 seconds"


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