1 Topic by berthageorge

  • berthageorge
  • Member
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  • Registered: 2018-09-18
  • Posts: 9

Topic: Undelivered Mail Returned to Sender

==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):  V2.8.0
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I am facing a problem in sending email to few domain;it says

host webmail.tx.com[IP Address] said: 554
    5.7.1 This message has been blocked because the HELO/EHLO domain is
    invalid. (in reply to MAIL FROM command)

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
  • Offline
  • Registered: 2009-05-06
  • Posts: 31,088

Re: Undelivered Mail Returned to Sender

What's your HELO/EHLO hostname? It must be a FQDN and resolvable by DNS query.