I forgot to address your last question in my previous reply.

Q8: Is there DCC support? (Distributed Checksum Clearinghouse)
A8: Xeams has its own mechanism to handle this. There are two rules:

• Xeams has its own RBL server, which could blacklist misbehaving IP addresses
• IP reputation filter, which looks at last 7 days of IP addresses
• Fuzzy Search, which creates a fuzzy checksum of previously received messages and assigns score if similar message comes back