There are filters available to do filtering with XMail based on SPF = data. However, there are two other important issues to fully supporting SPF. = One is SASL SMTP (allowing customers to send email on port 587, but only = with SMTP AUTH). You can easily bind XMail's SMTP service to both ports 25 & 587, but XMail does not yet have any way of setting up port 587 to be = SMTP AUTH only. The other issue is SRS (Sender Rewriting Scheme). With SRS = and SASL SMTP support, it is not practical to enable SPF within our own DNS records. It is unfortunate, because I would love to be able to fully = deploy SPF to protect all of the domains I host against forgery. At this = point, all I can do with XMail and the existing SPF filters is filter incoming email to prevent forged emails from arriving. It's a start, but more = work still needs to be done. I'm really excited for the day when XMail = supports SASL SMTP and SRS.
Some people will argue that SASL SMTP and SRS could be implemented using perl or bash filters. I think that is the wrong move, since these are = core functions that need to be as fast as possible to scale properly. = Spawning separate processes instead of handling the task in process is slower, especially on Windows platforms. For more info on SRS: http://spf.pobox.com/srspng.html http://spf.pobox.com/emailfwdpng.html For more info on SASL SMTP: http://www.faqs.org/rfcs/rfc2222.html -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] = On Behalf Of Tom Banting Sent: Tuesday, October 12, 2004 11:13 AM To: [EMAIL PROTECTED] Subject: [xmail] SPF Has anyone added SPF functionality to xmail? - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
