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RCPT from unknown[]: 450 4.7.1 Client host rejected: cannot find ...

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  2. questions
  3. reject-rcpt-from-unk...
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2022/8/28 -As far as I can tell, the error message is "reverse hostname" related. I am outside my normal hostname. But Thunderbird should log in and still ...


450 4.7.1 Client host rejected: cannot find your hostname - Plesk Support

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Cause. Incorrect or missing PTR record of the sender's mail server. Resolution. Contact the server hoster or provider of the IP address in order ...


[Solved] Postfix: Client host rejected: cannot find your hostname

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  2. Newbie Corner
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  2. Newbie Corner

2018/8/22 -Everything is working properly except receiving mails (which should obv. work). I'm running the setup in a systemd-nspawn container. the postfix ...


450 4.7.1 Client host rejected: cannot find your reverse hostname #2282

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  2. mailcow
  3. mailcow-dockerized
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  2. mailcow
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2019/2/8 -Hi, I'm not receiving some emails from some hostnames. I'm getting below error: postfix-mailcow_1 | Feb 8 20:30:05 mail ...


450 4.7.1 Client host rejected: cannot find your hostname - Plesk Forum

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2017/5/18 -Hello. I am having a big issue with this. I am using Plesk Onyx Version 17.5.3 Update #6 Web Host Edition on Ubuntu 14.04.5 LTS.


Client host rejected: cannot find your hostname - Google Groups

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Hi,. I'm using zimbra with Postfix as MTA. I got the following error message which indicate mail rejection based on hostname not find.


450 4.7.25 Client host rejected: Cannot find your hostname (Page 1)

  1. https://forum.iredmail.org
  2. topic19773-450-4725-client-...
  1. https://forum.iredmail.org
  2. topic19773-450-4725-client-...

2023/5/15 -- Deployed with iRedMail Easy or the downloadable installer? - Linux/BSD distribution name and version: Ubuntu 18.04 - Store mail accounts in ...


Client host rejected: cannot find your hostname - Support - cPanel

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2021/2/16 -Description. Checks against the hostname are needed to ensure that the hostname is properly resolving to the server. Here are the commands ...


450 3.7.1 Client host rejected: cannot find you hostname, [...] (in reply to ...

  1. https://forum.proxmox.com
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  3. 450-3-7-1-client-...
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2020/10/14 -Hi! We successfully installed Proxmox Mail Gateway with SPF, DKIM and the whole shebang, and it is working fine. Sort of.


Outlook SMTP Send Mail Problem : Client host rejected: cannot find ...

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  1. https://forum.centos-webpanel.com
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2020/8/10 -Outlook SMTP Send Mail Problem : Client host rejected: cannot find your hostname.