Double respone with code 220 from smtp

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prizes
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Joined: Mon Nov 30, 2020 11:29 am

Double respone with code 220 from smtp

Post by prizes »

Hello everyone.

I am serving 2 Zimbra mail servers on Ubuntu.
Both have a 220 double response issue on smtp session.
A colleague using Zimbra on CentOS has no such problem.

What is the reason?

Image

I can’t repeat it myself via telnet

Some testers think that I have open relay, but this is not the case and this can be seen in WireShark
Last edited by prizes on Thu Dec 02, 2021 5:36 am, edited 1 time in total.
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L. Mark Stone
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Re: Double respone with code 220 from smtp

Post by L. Mark Stone »

We really need to see unobfuscated log file snippets detailing the error, and the output of zmcontrol -v to be able to help.

All the best,
Mark
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L. Mark Stone
Mission Critical Email - Zimbra VAR/BSP/Training Partner https://www.missioncriticalemail.com/
AWS Certified Solutions Architect-Associate
prizes
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Re: Double respone with code 220 from smtp

Post by prizes »

zimbra@mail:~$ zmcontrol -v
Release 8.8.15.GA.3869.UBUNTU18.64 UBUNTU18_64 FOSS edition, Patch 8.8.15_P27.

version indicated above.

But I did not quite understand what kind of log we are talking about. Where and how to find it?
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L. Mark Stone
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Re: Double respone with code 220 from smtp

Post by L. Mark Stone »

https://wiki.zimbra.com/wiki/Log_Files

Typically errors are found in zimbra.log (MTA/system) and mailbox.log (mailbox service).
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L. Mark Stone
Mission Critical Email - Zimbra VAR/BSP/Training Partner https://www.missioncriticalemail.com/
AWS Certified Solutions Architect-Associate
prizes
Posts: 8
Joined: Mon Nov 30, 2020 11:29 am

Re: Double respone with code 220 from smtp

Post by prizes »

I did not notice any errors in the logs.

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prizes
Posts: 8
Joined: Mon Nov 30, 2020 11:29 am

Re: Double respone with code 220 from smtp

Post by prizes »

Anyone have any ideas?
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