3rd Party Spam Filter

Hi everyone,

I have a simple questions that's been bothering me for a while now. I have a 3rd party Spam Filter connected to my Office 365 Tenant. When an external sender sends me a legit email it is being tagged as a SPAM. My question is when the email passes through the 3rd party spam filter, is the email still going to be scanned by Office 365 EOP once it reaches Microsoft server or will it bypass EOP?
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marcusAsked:
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JohnBusiness Consultant (Owner)Commented:
Unless you turn filtering off, it will get scanned again. Given that your filter catches most of the spam, there won't be much resource used, so it is probably not a big deal.
marcusAuthor Commented:
My problem is some legitimate emails are sent to junk even with SCL 1, SPF passed, all clean. If the email was tagged as NOT SPAM by my 3rd party spam filter they why is it still going to my junk folder? My suspicion is that EOP is the one doing it but there's no way I can disable it.
JohnBusiness Consultant (Owner)Commented:
Probably the easiest way is to go to the Junk folder, right click on the email and mark it Not Spam and / or whitelist the address. It will right itself over a short time

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marcusAuthor Commented:
I can do that, but it still doesn't solve the problem because it happens in random to any legitimate sender. Something is off, it might be a back end issue with either Microsoft or my 3rd party. I might give them a call.
JohnBusiness Consultant (Owner)Commented:
In Outlook, you can go to Junk Properties and turn the Junk filter.

I am not sure if there is an Exchange counterpart
marcusAuthor Commented:
Unfortunately there's no option for that.
JohnBusiness Consultant (Owner)Commented:
There is the option in the Outlook client so use that
JohnBusiness Consultant (Owner)Commented:
Thank you Marcus and I was happy to help
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