Thunderbird excels at spam detection
Open-source email app Mozilla Thunderbird includes highly efficient spam filters using Bayesian statistical analysis.
After a bit of training, its spam detection rate is stellar, and false positives are practically nonexistent.
If you don’t like spam in your Mozilla Thunderbird inbox, turn on thejunk mail filter.

Over time, it learns which words typically appear in junk email and which appear mostly in good messages.
For each account, go to theJunk Settingssection and selectEnable adaptive junk mail controls for this account.
In theSelectionsection, selectTrust junk mail headers set by.

choose the spam filter used from the list that follows.
Junk emails don’t come from identifiable stable email addresses.
