Error 550.5.7.162 OmeEncryptionAgent

Question

Error 550.5.7.162 OmeEncryptionAgent

Tom van den Berg 10

Hi there,

A lot of mails are not deliverd in our company with the error code:

Error: 550.5.7.162 OmeEncryptionAgent: Permanent Failure 550-5.7.162 Exception encountered: RmEXception.
Exception message: ETR encryption only applies to outging mail. Failurecode:UnknownFailure: Recoverable:False.

I already whitelist one of the external domains, but this did not solve the issue. and it looks like more and more mails are failing with this code.

Someone any idea what is going on.

Thanks in advanced.

Tom

Swapnil Dilip Chorge 0 Reputation points

2023-05-17T20:38:33.26+00:00

This happens if you have a mailflow rule setup in your tenant for all emails to be encrypted. Instead edit the rule to be applied on outgoing emails only. This can be done in admin center-mailflow-rules. Apply this rule if the recipient is external - outside the organisation. You may also need to check if you are using OMEv1 or OMEv2. If you are using OMEv2 then you need to select action as to Apply Office 365 Message Encryption and rights Protection.

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Swapnil Dilip Chorge 0 Reputation points

2023-05-17T20:38:33.26+00:00

This happens if you have a mailflow rule setup in your tenant for all emails to be encrypted. Instead edit the rule to be applied on outgoing emails only. This can be done in admin center-mailflow-rules. Apply this rule if the recipient is external - outside the organisation. You may also need to check if you are using OMEv1 or OMEv2. If you are using OMEv2 then you need to select action as to Apply Office 365 Message Encryption and rights Protection.

Answer 1

Kai Yao 37,766 Moderator

Hi @Tom van den Bery,

Recently there have been several similar issues.

If possible please consider creating a service request in Microsoft 365 admin center>Support>Help & Support for help.

Here is also a thread discussing this issue for your reference: Remote server returned '550-5.7.162 OmeEncryptionAgent

(Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)

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Tom van den Berg 10 Reputation points

2023-05-18T07:25:42.2933333+00:00

Hi, Thanks for your reply.I Already created a ticket yesterday. Waiting for MS response now.
Kai Yao 37,766 Reputation points Moderator

2023-05-19T06:37:21.3633333+00:00

Thanks for the information!

Please feel free to post back if there is any update on this issue.
Tom van den Berg 10 Reputation points

2023-05-19T06:42:27.2766667+00:00

It looks like my colleague created a rule a while ago to encrypt mail based on keywords in de body.
I have modified the rule so that it only encrypts the messages when the sender domain is from our domain. First test was working fine, i have to check the logs next days to see if this was indeed the issue.

Strange thing is that this rule was already activated months ago.

keep you updated.

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Error 550.5.7.162 OmeEncryptionAgent

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