Sender domain 'mydomain.xxx' has a DMARC policy, but cannot use configured return path domain

Good morning,

We have implemented DKIM and DMARC but one of my thirth party companies how sends mail on our behalf gets a bound message: Sender domain ‘mydomain.xxx’ has a DMARC policy, but cannot use configured return path domain.

any one got an idea how to solve this? I looked and read to many forums and articles but can’t find the correct way to solve this.

Rgds
Richard

Hi Richard-

Have you contacted the 3rd party’s support about the issue? It sounds like something you both will need to work together on.

If it is a major 3rd party email service they should have information available about how things must be configured in order to work properly with DMARC.

I can’t say exactly what the issue is based on the information you provided but it would seem to be related to the combination of the “from” and “return path” settings on the outgoing messages. Something isn’t playing well together.

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