On Sun, 2005-11-13 at 13:17 -0600, Les Mikesell wrote: > Note that there is an RFC that says you MUST NOT reject on a mismatch > between the HELO name and the connecting IP address. Multi-homed > servers are not expected to adjust their name to match the interface > that happens to be used for each connection and it is common for > servers to live behind a NAT gateway and not even know the public > IP address in use. I thought that might be the case. I post locally though my own sendmail, which smarthosts through my ISP's SMTP server. Some of the mail headers are going to have private (LAN) IP addresses (both my own mail server, and any mail handlers inside the ISP). However, you can use such things in the rating of whether something might be spam. i.e. The more mismatches, the more likely it's spam. -- Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists.