What is the best way to block an abuser?
Here are ways to block a HexValidEmail abuser. They are ordered from most desirable to least: • Block or filter the IP address. This will usually stop the individual without affecting anyone else. The abuser can circumvent this measure by switching to a different IP address. • Block the full MAIL FROM address. For HexValidEmail 1.2 and later, this will stop the abuser and, in some cases, unlicensed HexValidEmail users. The abuser can simply change the MAIL FROM address to circumvent this. • Block an IP address range, such as the class C range containing the abuser’s IP address. This risks shutting out innocent bystanders, but will prevent an abuser from simply using another IP address on his local network. The abuser will have to get an IP address that is further away in the address space. • Block sessions with a hexillion.com HELO domain. This will shut out all HexValidEmail users, even the many legitimate ones, until they change the default HELO domain. It will not block email from H
