Yep...definitely shows that SPF has some growing to do, but the situation can improve with widespread adoption.
For your hotel situation, you might try setting your mail server to accept SMTP AUTH traffic on port 587. That way if 25 is blocked but 587 is open you can continue to use your mail server. However, it does have some benefits. SPF can significantly cut down on forging spam, as mail that fails SPF can be weighted fairly high as potential spam. Darin. ----- Original Message ----- From: "David Dodell" <[EMAIL PROTECTED]> To: "Darin Cox" <[EMAIL PROTECTED]> Sent: Saturday, September 11, 2004 10:20 AM Subject: Re[2]: [Declude.JunkMail] SPF Records and Off-Network Customers Saturday, September 11, 2004, 7:04:55 AM, Darin Cox wrote: > Yes. One of the flaws of SPF. However, you can also use a weaker SPF > record that says basically that you don't know what mail server it is coming > from. Not much point in that except to say that you're using SPF, though I > suppose it might be possible that a particular mail admin might penalize > sites that haven't implemented SPF in spam weighting. This is not good ... I don't see SPF becoming a useful tool, since I have a few customers in this particular situation, and without widespread SPF implementation I don't see it particularly helpful. > A caveat on the above flaw: SPF does have the ability to reference another > domains SPF records, so if the ISP in question has implemented SPF you > should be able to "inherit" their SPF implementation by referencing it in > your own. I haven't had an occasion to try that out yet, though. But this requires me to keep up each customers ISP ... what a pain. And what happens when one travels? I was traveling a few weeks ago, and the hotel's IP connection had port 25 blocked ... so I couldn't use my own SMTP server remotely using SMTP AUTH. I called the hotel's ISP and they opened up port 25 for my room's IP for my stay since I was going to be there for a week, but the average person is not going to do this. --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com. --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.
