Contacts email marked as Junk

[jl123]

All of a sudden emails from someone in my Address Book is going into the Junk folder.
I have the Settings Do not automatically mark email as junk if Sender is in Collected, Personal, etc. checked.

How do I stop legit emails from going into the Junk Folder?
I do mark them as Not Junk when it does go into that Folder.

Thanks in advance.

Windows 10 Pro
TB 91.9.0

[tanstaafl]

I don't see any recent similar threads on this forum or in the official support forums so its probably not a bug introduced in 91.9.0. Does this problem only occur for one sender?

You could try running in safe mode via help -> troubleshoot mode and see if this is a weird side effect of an add-on that isn't fully compatible with 91.9.0.

[jl123]

I don't see any recent similar threads on this forum or in the official support forums so its probably not a bug introduced in 91.9.0. Does this problem only occur for one sender?

You could try running in safe mode via help -> troubleshoot mode and see if this is a weird side effect of an add-on that isn't fully compatible with 91.9.0.

I tried the troubleshoot mode.
No error or crash reports showing up.
I do not have any add-ons installed.

Yes, so far it was with only one sender. Strange. As this sender has been around for many years without
any problems like this.

[tanstaafl]

The order of processing is:

Message filters
"Trust header"
"Adaptive junk" (junk mail controls)

As a temporary workaround see if creating a message filter to move all messages from that sender to the inbox (even though its already in the inbox) helps. I'm hoping that it will fail (do nothing) but as a side effect prevent the junk mail controls from processing that message.

http://kb.mozillazine.org/Junk_Mail_Controls

[jl123]

Thanks I will give that a try.