Poco Junk Mail FAQ - Messages from a banned sender are still getting through

Q: Banned sender with Junk Mail filtering on a specific message. The sender address is correctly added to junksender.txt file.

When later receiving a message from the SAME sender it goes to the IN mailbox instead of JUNK MAIL box. Enable automatic Junk Mail filtering is checked.

Running the Junk Mail Test on this new message says it would not be considered as junk mail but may be this test do not take into account the Word lists.

 
A:
If banned sender is in one of your address books then Poco gives the message a heavy weighting in favour of it not being spam.

Slaven's comment: Early on we decided that if the address is present in the address book it is highly unlikely it is spam, so address books act as an automatic "allow senders" file.