Many companies have their ISP's smtp server setup to forward all their e-mail, which would fail the proposed test. With a distinct lack of RR IPs, this would include anyone who isn't big enough to have their own block of Ips.
Regards, Craig F. > -----Original Message----- > From: Tom Carroll [mailto:egor@;carrollweb.net] > Sent: Thursday, November 07, 2002 4:49 AM > To: [EMAIL PROTECTED] > Subject: [e-smith-devinfo] Feature request or devinfo > development issue > <snip> > > What I am wondering/wishing is if code can be added to the SMTP server > software to make it compare the actual valid DNS upon reverse > lookup to > the domain being claimed by the connection. If the claimed > domain is not > found anywhere within the string returned on the reverse lookup, the > connection would be closed with a 550 error to the SMTP server and > stopping the spammer at the front door and saving bandwidth. > > It should be just a simple comparison function to determine if the > reverse lookup matches the domain being claimed. It would be a very > useful feature! > <snip> > > Tom Carroll >
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