Affected version(s): All OX App Suite Cloud and OX App Suite Managed services.

Symptom

Incoming emails get blocked with any OXS_xxx error code.

Solution

Here you can find different codes, their description and needed information for Support to get this fixed.
we also got a table from VadeSecure now a so-called postmaster page for their EU platform:

https://postmaster-oxseu.vadesecure.com/

It explains reject codes to mail senders.

Error code	Description	Needed information for Support
OXS_202	Senders mail server does not have a valid DNS entry	Have to be fixed by sender DNS record have to be set as valid Not possible to solve by OX
OXS_303	Check sender domain	Have to be fixed by sender MX and/or A record have to be set as valid Not possible to solve by OX
OXS_304	SPF check failed	Have to be fixed by sender SPF record have to be set as valid Not possible to solve by OX
OXS_403	Unknown recipient	Date / Time Sender Receiver (optional) Subject The eml file if possible Please check: Does this user exist?
OXS_502	Mail is marked as SPAM	Date / Time Sender Receiver (optional) Subject The eml file if possible OX get in contact with AVAS partner to get this solved
OXS_503	Message too big	Date / Time Sender Receiver (optional) Subject The eml file if possible Threshold will be checked by OX
OXS_505	Too many messages per session	Date / Time Sender Receiver (optional) Subject The eml file if possible Threshold will be checked by OX
OXS_506	Too many recipients	Date / Time Sender Receiver (optional) Subject The eml file if possible Threshold will be checked by OX
OXS_604	Mail content not allowed	Date / Time Sender Receiver (optional) Subject The eml file if possible OX get in contact with AVAS partner to get this solved

Symptom

Solution

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