Here it is.
#
https://bitbucket.org/tildeslash/monit/issue/112/smtp-error#comment-14395650
#if failed host localhost port 25 type tcp protocol smtp retry 2
times then restart
if failed host localhost port 25 type tcp protocol smtp for 2
cycles then restart
Full config:
https://github.com/szepeviktor/debian-server-tools/blob/master/monitoring/monit/services/courier-mta#L5-L7
Once I was even starting a shell script when Monit told me that
Courier is not responding on 127.0.0.1:25
That included tcpdump, netstat etc. Revealed *nothing*
I appreciate your help and advise.
Idézem/Quoting Lindsay Haisley <[email protected]>:
> On Wed, 2016-12-28 at 20:02 +0100, SZÉPE Viktor wrote:
>> Good evening!
>>
>> I am investigating a strange monitoring phenomenon.
>> localhost (lo interface) is monitored on port 25 with a program
>> called Monit.
>> Monit generates a very small SMTP communication.
>> Usually it is OK.
>>
>> When the Internet-facing interface (eth0) is down - for some reason
>> but not DHCP - the test fails.
>>
>> Of course couriertcpd binds on 127.0.0.1 only as "ADDRESS=127.0.0.1"
>>
>> Could it be that Courier unbinds from localhost when eth0 is down?
>> Thanks.
>
> I also use Monit, although not to monitor the status of lo. I would
> look, for the source of this phenomenon, to the configuration stanza in
> /etc/monit/monitrc (or one of the config subfolders of /etc/monit).
>
> --
> Lindsay Haisley | "UNIX is user-friendly, it just
> FMP Computer Services | chooses its friends."
> 512-259-1190 | -- Andreas Bogk
> http://www.fmp.com |
>
>
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SZÉPE Viktor
https://github.com/szepeviktor/debian-server-tools/blob/master/CV.md
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