# Spam Classifications

The following table describes the possible Spam classifications that Commtouch can return in response to a request from the querying devices.

Confirmed | Spam messages from known spam sources (e.g. zombies).
Bulk | Spam messages from sources that are not confirmed spammers.
Suspected | Legitimate messages that are sent to slightly larger than average distribution or are unidentified spam messages in the first few seconds of a massive spam outbreak.
Valid Mail | Messages for which Commtouch does not have any incriminating information, and are therefore assumed to represent legitimate correspondence.
NonSpam | Messages that are confirmed, without doubt, as coming from trusted sources. This classification is very rarely used.