Jan 16 2019
- last edited on
Mar 31 2022
We're working through DMARC for our org, and I'm trying to understand why O365 doesn't produce DMARC reporting for mail it receives - that can be consumed and analysed?
I've spoken to a couple of people at MS and have gotten a response that revolves around relying on other email providers DMARC reporting (like Gapps etc).
We are getting reporting from all other large email providers that produce it, however we have a massive blind spot for all O365 email traffic - both to our tenant but also anyone else using O365.
Given the prevalence of large corps using O365 - I can't quite wrap my head around why this isn't a bigger thing.
Is there anyone that can shed some light on why this is the case - or better yet if we could somehow get O365 producing DMARC reporting?
Jan 16 2019 02:25 PM - edited Jan 16 2019 02:28 PMSolution
This has been asked for a very long time - I had customers as far back as 2012 asking for it when I started doing large scale migrations to Office 365. As expected there is a Uservoice open for it.
When Microsoft themselves implemented DMARC they used Agari for the reports. There was quite a well known blog series by Terry Zink on it at the time. Whilst they ended up introducing DKIM into the EOP service on top of SPF and began using DMARC - even to the point of instructing how to put together a DMARC record and tightening it over time, they never got involved in the reporting side of things. Agari was usually recommended for enterprise size clients whilst DMARCIAN was recommended for SMB.
They never explained exactly they never got into DMARC reporting. I guess this is something to vote for on the Uservoice to try and push it to their attention. It would make complete sense - and even more to analyse that in Power BI.
Hope I have answered your question.
Jan 16 2019 04:16 PM
Thanks Chris - the extra info/context is super helpful.
We have a tool in place (like Agari) to aggregate the reporting to then use in building out our SPF and DKIM setup in prep for DMARC - we're just missing so much not having reporting/telemetry coming from O365 and feeding into the tool we use.
I'm not ready to give up on this one just yet - so will keep poking to see if I can get something more.
Sep 12 2019 06:50 AM
Nov 07 2019 05:08 PM
Valimail is a reporting tool (similar to something like Dmarcian), this doesn't address the issue of Microsoft not sending DMARC reports.
For example I run HelpScout as a help desk for one business, DKIM, SPF and DMARC are all configured. I can see that Google, Yahoo, etc. are receiving emails from Helpscout and they are passing and domain aligned. Great.
But then a customer tells me the emails are going to his junk folder, I check and he is on Office365...
I have no visibility from Microsoft servers if they are happy with the email authentication or not. I assume they are, but I have no idea. I also have no idea if anyone is trying to spoof our domain to Office365 users.
The same problem if I am helping other clients not on Office365 with their deliverability...
I just don't understand why Microsoft wouldn't comply with the DMARC reporting like all the othe big providers?
Dec 04 2019 08:55 AM
Thanks @Christopher Hoard
My question is less about report aggregation (like Agari) and more about MS producing DMARC failure and aggregate reports from O365 (like Gsuite and others do) that are sent to whoever we specifcy in our DMARC record so we can then do the aggregation.
Without DMARC reporting generated from O365 - we're missing a huge amount of data/visibiltiy into what is passing and failing our DMARC records.
Dec 04 2019 09:17 AM
Dec 04 2019 09:20 AM
Thanks @Christopher Hoard
Yeah, no problems. I've tried the last couple of times I was in Redmond to find the right person within O365 to understand where this sits but haven't had a huge amoutn of luck.
Apprecaite the responses.
Dec 04 2019 12:47 PM
This Uservoice is currently #7 in General...
General is probably not the best place for it, but surely that should get it some attention?
I feel like a few high profile tech/security reporters need to write up a scathing article or 3 about about this to get some traction...
Jan 23 2020 02:08 AM
Sep 17 2020 07:00 AM
I have the answer. They used to offer reporting but turned it off. many have asked for it to be re-enabled. https://www.computerweekly.com/news/252466778/NCSC-calls-out-Microsoft-over-Dmarc-reports
There is a solution from OnDMARC. they have written an O365 reporting module that sends the DMARC fail data to the OnDMARC reporting tool in a special tab.
Hope that helps.
Dec 13 2020 04:12 AM
"Valimail is a reporting tool (similar to something like Dmarcian), this doesn't address the issue of Microsoft not sending DMARC reports. "
This seems odd, as Microsoft promotes this service and Valimail says it completes O365. And their service is free specially for O365 customers!
Just made an account with them, waiting for any data to appear to the dashboard.
If this works, it tells that MS is letting the reports to certain partners, but not all. Then we might discuss about visibility and equality....
Jan 12 2022 05:18 AM
Jan 12 2022 06:18 AM
@dolce-anthonyhave you seen this - https://www.microsoft.com/security/blog/2021/09/01/get-free-dmarc-visibility-with-valimail-authentic... "September 1, 2021 Get free DMARC visibility with Valimail Authenticate and Microsoft Office 365"
Jan 12 2022 04:10 PM
Jan 12 2022 04:39 PM
Mar 18 2022 07:52 AM
Maybe there's an internal disagreement about how to describe DKIM failures on reports?
On normal dmarc reports, Microsoft's default dkim signing approach for O365 would look problematic. However, their default dkim approach seems to work well for O365 clients who are just emailing other O365 clients (as long as the mail doesn't have to go through a 3rd party spam filter along the way).