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Getting Started Guide How does GFI MailEssentials work?  3
2 How does GFI MailEssentials work?
2.1 Inbound mail filtering
Inbound mail filtering is the process through which incoming email are
filtered before delivery to users.
Figure 1 - Inbound mail filtering
When an email is received:
SMTP level filtering (Directory Harvesting and Greylist) is executed
before the email body is received.
When the email is received, it is checked to see if it is addressed
to a list in the list server. If the email matches a list, it will be
processed by the list server.
The incoming email is filtered using all the spam filters. Any email
that fails a spam filter check is sent to the anti spam email actions. If
an email goes through all the filters and is not identified as spam, it
then goes to the next stage.
If configured, email is next archived to the archiving database.
If configured, auto-replies are next sent to the sender.
If configured, email monitoring is next executed and the
appropriate actions taken.
The new senders filter is now executed.
Email is sent to the user‟s mailbox.