1 Topic by Archer

  • Archer
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  • Registered: 2021-07-27
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Topic: Mail error - Client host rejected: cannot find your hostname

==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): v0.9.7
- Deployed with iRedMail Easy or the downloadable installer? Unkown
- Linux/BSD distribution name and version: Linux Mint 4.8.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx):Apache
- Manage mail accounts with iRedAdmin-Pro? No
====
Hello!
I've got a problem whith the email server. When I sent an email to some adresses, I get return letter whith an error.

The Error's text is:
host mail1.c2o.shop[80.246.244.122] said: 450 4.7.1
    Client host rejected: cannot find your hostname, [81.23.101.134] (in reply
    to RCPT TO command)

----

Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2 Reply by Archer

  • Archer
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  • Posts: 2

Re: Mail error - Client host rejected: cannot find your hostname

Up

3 Reply by Cthulhu

  • Cthulhu
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  • Registered: 2019-06-04
  • Posts: 821

Re: Mail error - Client host rejected: cannot find your hostname

81.23.101.134 -> gate-2.euroceiling.ru

I guess you have neither a PTR, nor set a hostname for your mailserver