We are sending email from system "sympa" through o365, using it as an email realy. Sympa signs the mesages using arc, both spf, dmarc and dkim er ok, but o365 fails messages with arc=fail(47) without furhter explanation. Other recipients as gmail accept

Question

We are sending email from system "sympa" through o365, using it as an email realy. Sympa signs the mesages using arc, both spf, dmarc and dkim er ok, but o365 fails messages with arc=fail(47) without furhter explanation. Other recipients as gmail accept

Erik Sørnes 0

Sending email through o365 as mail relay from aplication "sympa". o365 fails mail with cv=fail, arc=fail (47), with out further explanation. Our subdomain is on thrusted senders list, and spf, dmarc and dkim all turns out green on i.e. mxtoolbox.com. This is very strange. Anybody else experienced this?

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Answer 1

Anonymous

Hi, @Erik Sørnes

I noticed that you are using relays to send emails, are you configuring them according to the method in that article?

How to set up a multifunction device or application to send emails using Microsoft 365 or Office 365 | Microsoft Learn

Which scenario did you configure according to the article? You can start by checking that the settings are correct according to the article.

Also can you describe your working environment and other details so that I can do accurate troubleshooting?

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Anonymous

2024-09-13T09:14:57.7133333+00:00

Hi, @Erik Sørnes

Any updates so far? If you have solved your problem, could you share with us? Maybe it will help more people with similar problems. Don't forget to mark it as answer, this will be easy for other community members to find the useful one.
Anonymous

2024-09-17T06:51:14.5433333+00:00

Hi,@Erik Sørnes

It's been a long time since I've heard from you, is there any new progress?
Anonymous

2024-09-20T07:54:03.9133333+00:00

Hi,@Erik Sørnes

Just circling back to check to see how things are going on with this thread. Should you need more help on this, you can feel free to post back.

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We are sending email from system "sympa" through o365, using it as an email realy. Sympa signs the mesages using arc, both spf, dmarc and dkim er ok, but o365 fails messages with arc=fail(47) without furhter explanation. Other recipients as gmail accept

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