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Re: monit 5.4 violating smtp protocol
From: |
Martin Pala |
Subject: |
Re: monit 5.4 violating smtp protocol |
Date: |
Wed, 29 Aug 2012 20:49:57 +0200 |
Hi Len,
thanks for report, the problem is fixed in the next Monit release.
Regards,
Martin
On Aug 23, 2012, at 3:18 PM, Len Conrad <address@hidden> wrote:
>
> 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
>