1 Topic by markpike

  • markpike
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  • Registered: 2014-07-05
  • Posts: 23

Topic: 451 4.6.0 Alias expansion error

==== Required information ====
- iRedMail version: 1.8.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
====

Client is trying to send to a mailing list (alias) which has approx 2000 recipients.
Upon send, they are receiving the following error: 451 4.6.0 Alias expansion error

Any idea on how to correct this?

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
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  • Registered: 2009-05-06
  • Posts: 30,788

Re: 451 4.6.0 Alias expansion error

You can try to increase value of Postfix parameter 'virtual_alias_expansion_limit', for example:

# postconf -e virtual_alias_expansion_limit=2500
# service postfix reload

Default value is 1000.

Reference: http://www.postfix.org/postconf.5.html# … sion_limit