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Strange error. What can I do?

FIXED
Kirdamato
Newbie
Posts: 1
Registered: 05-04-2018

Strange error. What can I do?

Backoff Reason: 2018-04-04 15:17:56 "220 avasin02.plus.net Plusnet Cloudmark Gateway ESMTP server ready" received from mx.avasin.plus.net (212.159.9.200) matching /Cloudmark/

When I try to send mail to my customer who have .plus.net mailbox  I get the error. Resend didn't help. Maybe someone know what it mean and how to solve the problem?

1 REPLY
Superuser
Superuser
Posts: 9,583
Thanks: 958
Fixes: 55
Registered: 06-04-2007

Re: Strange error. What can I do?

Fix

It looks to me that the Plusnet MTA has responded with a normal 220 string identifying itself and confirming it is ready to receive. But then your MTA has backed off because that string contains Cloudmark. You need to find out why your MTA declines to interact with Cloudmark devices.

David