Fighting against SPAM
We deny unsolicited email (so-called SPAM mail. it's also called UBE or UCE).
We may deny mail that fits the following conditions.
- The address of the sender (envelope from) is not appropriate.
We unconditionally deny mail with inappropriate address i.e. MX is
not resoluble, etc.
- The address of the sender (envelope from) is on our black list.
We put the senders on our black list and deny mail from them, if
they sent us unsolicited mail frequently.
- The IP address of the server sending mail is not resoluble.
We deny mail from servers that is not appropriately registered on
the name server.
- The server sending mail is on the black list.
We deny mail from servers that is on the black lists such as
- The server sending mail is a dial-up host.
We deny mail directly sent from a dial-up host without using
sender's own provider's mail server as a relay. We regard a host as
a dial-up host when it is on the list of dial-up hosts such as
- The server sending mail is an open relay.
We deny mail from open relays that is on the list of open relay
hosts such as
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