• The APS Catalog has been deprecated and removed from all Plesk Obsidian versions.
    Applications already installed from the APS Catalog will continue working. However, Plesk will no longer provide support for APS applications.
  • Please be aware: with the Plesk Obsidian 18.0.78 release, the support for the ngx_pagespeed.so module will be deprecated and removed from the sw-nginx package.

Client host rejected

L

LiquidSolid

Guest
Hi Folks,

Lately some of my customers are receiving the following error when sending e-mail.

error message:
-
a.a.a.a does not like recipient.
Remote host said: 450 Client host rejected: cannot find your hostname,
[x.x.x.x] Giving up on a.a.a.a.
-

Previous I used an internal ip behind a firewall, so I installed a new system with an external ip adres. Unfortunately this didn't solve the problem. I checked their DNS settings and they point to mail.<domain>.nl, which has the correct ip's. The hostname of the server is plesk01.<domain>.nl

Do you guys have any idea where to look in order to solve this issue?

Another small issue is that I would like to change the SOA refresh time of the DNS server. Any clue where to change these parameters within the plesk installation?

Thanks a lot.
 
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