The main types of checks done by SpamAssassin are: After Fastmail receives the email, we perform a number of checks based on the content of the email to try and determine if the email is spam.Įach message we receive is analyzed using SpamAssassin and assigned a spam score. While these tests are very effective, they can't stop all spam, and some still enters the Fastmail system. The spam checking processĪs mentioned on the SMTP checks page, Fastmail performs many checks at the time an email is received to stop spam. You can also specify how to deal with backscatter. If you do not enable this, reporting emails as spam or not spam will still train your personal spam database. This includes both false negatives (emails you report as spam) and false positives (emails relayed to the spam folder, which you report as not spam). By default, we move anything with a score of 5 or higher to your Spam folder.Įnabling Fighting Spam lets us report incorrectly categorized emails to our partner organizations which provide us with spam feeds. These are determined by a message's spam score, which is a number that shows how likely the message is to be spam. The spam protection level dictates when a message will land in your Spam folder and when a message will be discarded immediately, without you ever seeing the message. Spam protection settings can be controlled by going to Settings → Mail Rules and clicking Spam protection.įrom this screen, you can choose your account's spam protection levels. We can stop many spam emails before they even arrive on our servers, and most remaining spam messages are caught and filed into Spam for an individual user to check. Fastmail has robust spam filtering options that can be customized to a user's needs.
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