The following is a summary of SPAM measures currently used by our servers:
1) Is it real? Each message is tested for authenticity in numerous ways, we even ask the sending server if the "from" address is from a valid sender. Messages with falsified server info, faked server addresses, unknown senders or forged (spoofed) headers are immediately rejected.
2) Is it safe? Our virus scanner scans the message for viruses and worms. Any message with unsafe or infected attachments is immediately rejected.
3) From a known spammer? Every message source is checked against several spam detecting services to see if it is from a known spam source. We currently check each message's source with: spamcop.net, spamhaus.org, abuseat.org, njabl.org, Razor and the Distributed Checksum Clearinghouse anti-spam databases. Any message coming from a server that is listed on one of these databases is immediately rejected.
Hosting Team Leader.