Protocol Filtering; Domain Filtering - Vade Retro mailcube Administrator's Manual

This sub-section allows you to define protocol filtering and block spam sent by certain botnets
(Figure 7-2):
The following actions are possible:
§ Delaying.
Do note that automated spam robots tend to rush the connection when they do not get an
immediate response. This option allows delaying the response to a connection request and to
close the connection if the remote server rushes sending.
The number of minor stretches to the protocol accepted.
§
The number of major stretches to the protocol accepted.
§

Domain filtering

This sub-section allows you to act on a number of domain filter settings: (Figures 7-3 and 7-4)
Protocol senders (Mail From:). You can deny or allow certain mail domains. If allowed, the
§
messages will be tested by sender domains.
Message senders (From:). You can deny or allow certain message senders (the name is the
§
one seen in the e-mail software)
DNS. You can enable this check which ensures that the domain name announced exists in the
§
DNS entries. You can also enable SPF (Sender Policy Framework) to compare IP addresses
of legitimate servers for a domain name and the announced server.
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Protocol filtering

Figure 7-2 Filtering section – Protocol filtering
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