[SAC] [OSGeo] #3004: free.fr about to block mails from osgeo due to excess errors

[OSGeo]

#3004: free.fr about to block mails from osgeo due to excess errors
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 Reporter:  strk                   |      Owner:  sac@…
     Type:  defect                 |     Status:  new
 Priority:  normal                 |  Milestone:  Sysadmin Contract 2023-II
Component:  Mails & Mailing Lists  |   Keywords:
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 https://postmaster.free.fr/index_en.html said:

 IP 140.211.15.3 is blacklisted for 79668s (too many errors (unexisting
 recipients, broken connections), testing)

 In the email, the error code is 421 :

 421 Too many errors from your IP
 Reason

 Your IP address is not blocked, but we do not accept anymore emails from
 you
 temporarily due to too much errors generated by your server. If your
 server
 continue to generate a big amount of errors, you will be blacklisted for a
 while and get the "550 Too many errors from your IP" error.
 Solution

     If you host your own SMTP server : while waiting this delay, we
 recommend
 you to verify your configuration (maybe you are an open relay ?). If you
 are
 using the “Sender Verify” method which make a connection to our servers to
 verify the validity of an email, we recommend you to disable it. Your
 server
 may also send automatic notices (undeliverable mails, autoreplies; etc.)
 when
 receiving spams. In this case, you should try to refuse a mail delivery
 the
 soonest possible (while receiving it) to avoid to have to deliver a
 delivery
 status notification and/or not to send an automatic reply on mails
 detected as
 spams.

     If you are using a SMTP relay: please contact your service provider.
-- 
Ticket URL: <https://trac.osgeo.org/osgeo/ticket/3004>
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