Problème de serveur mail

[jeff]

Bonjour,
il faut ajouter le serveur mail K-Net dans les listes des trucs à réparer. Il a été souvent en panne cette année, et depuis quelque semaines certains mails sont rejetés à la destination :

This is the mail system at host mgw2.kwaoo.net.

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# THIS IS A WARNING ONLY.  YOU DO NOT NEED TO RESEND YOUR MESSAGE. #
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Your message could not be delivered for more than 4 hour(s).
It will be retried until it is 5 day(s) old.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                  The mail system

<REDACTED@sfr.com>: host smtp1.sfr.com[77.154.154.200] refused to
    talk to me: 554-mx1-corp.sfr.com 554 Your access to this mail system has
    been rejected due to the sending MTA's poor reputation. If you believe that
    this failure is in error, please contact the intended recipient via
    alternate means.