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Knowledge Base

Email delivery fails: 5.7.1 Command rejected

 
emailmailmailboxmtaplesk for linux

Symptoms

  • Email delivery to the mailbox on the Plesk server fails with the error below:

    said: 550 5.7.1 Command rejected (in reply to DATA command)
    Reporting-MTA: dns; 203-0-113-2.example.com

  • The following messages can be found in /var/log/maillog file:

    greylisting filter[31260]: Remote host 203-0-113-2.example.com in black list

  • Greylisting is enabled on the server.

Cause

Sender hostname matches greylisting blacklist pattern.

Resolution

  1. Log into the server via SSH.

  2. Whitelist sender domain using instructions from the article:

    • How to configure Greylisting
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