Mail forwarding does not work correctly

Mail forwarding does not work correctly

Hi,

we use the external contact solution:

MS Exchange 2016 with distribution group and the external zoho contact  included.

Internal messages will forwarded correctly. external messages does not work really. Some mails get reach zoho desk some mails does not arrive.

I have checked the  exchange logs and get this errors:

    1. ServerIp                : 185.20.209.166
    2. ServerHostname          : mx.zoho.eu
    3. SourceContext           :
    4. ConnectorId             : Zohodesk
    5. Source                  : SMTP
    6. EventId                 : FAIL
    7. InternalMessageId       : 5158255723475
    8. MessageId               : <[a8062aaebf5447bf9bca18c5f6bd67c0-JFBVALKQOJXWILKCJQZFA7CJIFGVGU2QKJ6FGU2QKJCW2YLJNR6EK6DPKNWXI4A=@microsoft.com]>
    9. NetworkMessageId        : 06a17ed3-edb7-4bd9-c9e4-08db4b0a6a5c
    10. Recipients              : {support@xxxx.zohodesk.eu}
    11. RecipientStatus         : {[{LED=550 5.7.1 Email rejected per DMARC policy for microsoftonline.com};{MSG=};{FQDN=mx.zoho.eu};{IP=185.20.209.166};{LRT=02.05.2023 12:40:31}]}
    12. TotalBytes              : 27176
    13. RecipientCount          : 1
i dont get it. This ruins our whole ticket system, because we have to look into a extra mailbox to check if we missed some mails.




and this:

  1. ServerIp                : 185.20.209.166
    ServerHostname          : mx.zoho.eu
    SourceContext           : Using server config retry time of 00:05:00
    ConnectorId             : Zohodesk
    Source                  : SMTP
    EventId                 : DEFER
    InternalMessageId       : 2735894167633
    MessageId               : <MYju6M1iSISYNM3kycDWaQ@geopod-ismtpd-5>
    NetworkMessageId        : a21be7bc-26cb-43bb-1351-08db388dd508
    Recipients              : {support@xxxxx.zohodesk.eu}
    RecipientStatus         : {[{LED=451 4.7.1 Mail deferred due to antispam policy};{MSG=};{FQDN=mx.zoho.eu};{IP=185.20.209.166};{LRT=09.04.2023 15:08:39}]}
    TotalBytes              : 55220

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