1 Topic by cmancilla

  • cmancilla
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  • Registered: 2019-02-13
  • Posts: 14

Topic: error said: 550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1

==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):  0.99
- Deployed with iRedMail Easy or the downloadable installer?  download
- Linux/BSD distribution name and version: Centos 7.8
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro? no
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

When sending mail to some recipients, the following error appears:

said: 550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1) (in
reply
    to MAIL FROM 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 MuPp3t33r

  • MuPp3t33r
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  • Registered: 2017-01-17
  • Posts: 149

Re: error said: 550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1

I assume that this error is getting generated by the recipient's server, not your iRedMail server?
In other words, you send a message from your iredmail server and send to recipient's mail server, then you get the NDR?

More than likely, you have not configured your Reverse PTR record, so your HELO does not match your host name.

Otherwise, include the relevant sections of your mail log so we can see where it's failing.

3 Reply by ZhangHuangbin

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

Re: error said: 550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1

hi @cmancilla,

Please show us full bounce message, not just a snippet.
If there's related Postfix log lines, pleaes paste here too, that would be the best info to get help from others.