Best set up in Exchange Admin to prevent specific emails going to junk email

Copper Contributor

Hi
What is the best set up in Exchange Admin to prevent specific emails going to junk email?
Is it possible to create a rule to not be filtered to junk email if message matches last part of "Message ID" the @www.mywebsite.com ?
Using message trace the "From IP" seems to change so not sure that IP criteria is suitable?
It is a website contact form I want to allow.
Thanks

6 Replies

There are several ways to do this, but first it's best to determine why those messages end up in spam so follow the instructions here: https://docs.microsoft.com/en-us/office365/securitycompliance/prevent-email-from-being-marked-as-spa...

 

Based on your findings and the recommendations in the above article, you can whitelist the sender by domain or IP address/range via the EOP policy settings, or configure a transport rule that sets the SCL to -1 for messages from that sender, or advise users to add it to their safe senders list, etc.

@VasilMichev with the help you gave in my other post https://techcommunity.microsoft.com/t5/Exchange/Website-contact-form-going-to-junk-email-and-how-to-... I was able to see an issue with SPF, but in the headers I dont see "X-Forefront-Antispam-Report" to check https://docs.microsoft.com/en-us/office365/securitycompliance/prevent-email-from-being-marked-as-spa... only these 2 are in the headers "X-Microsoft-Antispam-Mailbox-Delivery" and "X-Microsoft-Antispam-Message-Info"

SPF is a good starting point, have you made sure that you've added the IP ranges to your SPF record?

@VasilMichev 

I have the IP for the web host server in my SPF record but according to message trace this is not the "From IP" ?
Message trace "From IP" seems to change and I have seen two class C networks so far which are not part of my web host server range.

Is it possible to set a rule based on the "Message-ID" header like "@www.mywebsite.com" or the "From:" header?

Rules give you a lot of flexibility, but I would suggest fixing that SPF issue first.

Hi @VasilMichev 

From previous Microsoft help advice I have tried adding the IPs to the default connection filter but never had any luck?
This is what my SPF record looks like v=spf1 +a +mx +ip4:"IP of shared web host server" +include:spf.hostedmail.net.au include:spf.protection.outlook.com -all
If I go the header rule way could I set up multiple criteria based on "Received", "From", "Message-ID" and am I correct with using "A message header includes any of these words" (or is it a pattern?)

Thanks