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willineu
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i get the 504 5.2.2, im running exchange 2007 with an edge server

everything was fine, and now i get this error
Fehler bei der Zustellung der Nachricht an folgende Empfänger oder Verteilerlisten:

Sekretariat MOLCÍK kipper, a.s.
Ihre Nachricht wurde aufgrund von Sicherheitsrichtlinien nicht zugestellt. Microsoft Exchange versucht nicht, diese Nachricht erneut für Sie zuzustellen. Wenden Sie sich mit dem folgenden Diagnosetext an Ihren Systemadministrator.

Die folgende Organisation hat Ihre Nachricht zurückgewiesen: mx.securitynet.cz.

Email ProtocolsExchange

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Alan Hardisty

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
robbe

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pvlier

Take a look at this: https://www.experts-exchange.com/questions/24388319/Your-message-wasn't-delivered-because-of-security-policies.html
(@robbe: here is the english translation: Your message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator.)

Satya Pathak

As per NDR 5.2.2 looks like Mailbox recipient has exceeded their mailbox limit.

May be help you.
Satya.
willineu

ASKER
the answers didnt help. the firewall entries are correct and the mailbox of the receipient are big enough.
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rwheeler23
Alan Hardisty

This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.