How does the mail server filter spam and viruses?
The mail server provides several layers of email filtering to reduce the amount of unwanted email delivered to your mailboxes on the shared system. • The source of the incoming email is compared to spam blacklists, including the Spamcop Blocklist, a dynamically refreshing database of IP addresses from which numerous spam messages have recently been reported. In the event of a match, the email is temporarily deferred for later attempted delivery. Depending on the sender’s ISP’s server configuration, re-delivery is attempted for 1-4 days. If the source of the email is no longer present in the spam blacklists upon any later delivery attempt, the email makes it to subsequent checks (described below). There currently is no way on the shared system to opt-out of this filtering. • The destination address is checked, and if it’s not valid (and you don’t have a catch-all address configured in the control panel, the email is returned to the sender with an ‘Unknown user’ error message. • As an em
