Key settings include the following general check parameters:
MX record availability check. If enabled, GateWall Antispam
will check for MX record availability on the domain specified in
the MAIL FROM command.
SMTP check (disconnection on bad command limit). Connection
with the client sending bad commands will be closed when the number
of bad commands exceeds the limit.
Server hello message delay.
Sender hash validation. The option is used to check the
validity of destination address when running GateWall Antispam as a
relay server.
Verification of host name received in HELO command ("Check host
on HELO"). Host name should be represented by a domain name.
Tarpitting mode (delay in server response when receiving a new
address in RCPT TO command). Tarpitting makes destination address
scanning a more time-consuming process.
