In order to increase the detection rate, you can specifiy for each country a score to add in detection engine.
This feature using the RelayCountry Spamassassin plugin that will add metadata to the Bayesian filtering process, allowing the Bayesian filters to learn information based on countries.
To Add countries scores :
- Go into Amavis configuration panel.
- Click on "SpamAssassin Features" icon
- On SpamAssassin Features icon, Click on "Deny Countries" icon
Note : if you see the icon in "grey" mode, like this picture , you need to upgrade SpamAssassin (see Install/Upgrade Spamassassin)
- On the new screen, select with the drop-down list the desired country and adapt the score for this country.
- All settings will by applied in realtime.
