Well it's already a feature in IMail 8.0: Reverse DNS Lookup Verification
The IP address of the connecting server is used to perform a reverse DNS lookup, to determine the domain name. If a domain has a valid PTR record, the message is accepted. If a reverse lookup fails, it means there is no reverse record for that IP address, and the message is marked as spam. An IP address with no PTR record is usually either a dial-up or spoofed, both of which are indicators of spam. However, it should be noted that a significant number of legitimate mail servers do not have a reverse DNS entry. This may cause legitimate mail to be marked as spam (false positive). FWIW.. we don't use the rDNS lookup verification feature.. 'yet' ~Rick ----- Original Message ----- From: David To: [EMAIL PROTECTED] Sent: Thursday, June 12, 2003 10:12 PM Subject: RE: [IMail Forum] OT: AOL's got nerve What is going to be the next step? Blocking email from servers that the reverse-DNS does not match the host greeting? Are there those on the list who going to claim that having a single IP mail server with virtual domains is dumb, a most probably a source for spam and should be banned? Is there room for bunker mentality on the Internet? The Internet should remain open to all and we should be working together (key word) against those that abuse it. Hell, there are so many people who abuse democracy maybe we should do away with it... ___________________________________________________________________ Virus Scanned and Filtered by http://www.FamHost.com E-Mail System. To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
