PowerMTA Support Forum

Please login or register.

Login with username, password and session length
Advanced search  


PowerMTA 5.0r3 is out!!!!  Please contact support@port25.com for a license and download access.

Author Topic: Free.FR 451 Errors  (Read 2373 times)


  • Newbie
  • *
  • Karma: +0/-0
  • Posts: 8
Free.FR 451 Errors
« on: March 23, 2017, 06:12:12 AM »

HI All,

We are getting continual 451 errors when sending to Free.FR MXs.
smtp;451 too many errors detected from your IP (xxxx), please visit http://postmaster.free.fr/

Not sure what to do to diagnose this. Has anyone solved this issue?

Should i maybe be doing a pmta trace for connections to the free.fr MX to see if there is more info in the handshake

My current config looks like this:

Code: [Select]
domain-macro free aliceadsl.fr, free.fr, online.fr, freesbee.fr, infonie.fr, libertysurf.fr, worldonline.fr, nomade.fr, chez.com, alicepro.fr

<domain $free>
  queue-to free.queue

<domain free.queue>
  route free.fr
    max-msg-rate 10/m
    max-smtp-out 1
    max-connect-rate 1/m
    max-errors-per-connection 1
    max-msg-per-connection 5
    backoff-max-msg-rate 2/m
    backoff-max-smtp-out 1
    bounce-after 4d


  • Full Member
  • ***
  • Karma: +21/-5
  • Posts: 440
Re: Free.FR 451 Errors
« Reply #1 on: March 23, 2017, 07:11:38 AM »

yes - turn on full logging for the domain and see what it says... either there is a communication error (encoding / ssl / etc.) or you're black listed on them.


  • Newbie
  • *
  • Karma: +0/-0
  • Posts: 8
Re: Free.FR 451 Errors
« Reply #2 on: March 23, 2017, 09:00:21 AM »

ok great thanks!
just found out it's because of invalid email addresses.
created a new forum post