Jason R. Mastaler wrote: > "Jesse D. Guardiani" <[EMAIL PROTECTED]> writes: > >> How could it be implemented in the MTA though? > > Ignorant of exactly how Postfix accomplishes this, I'd imagine it > would go something like this: > > You receive a spam message from [EMAIL PROTECTED]'. Before accepting > that message, your Postfix queries hotmail.com's SMTP server to see if > `bogus' is an invalid address (i.e, if mail to [EMAIL PROTECTED] would > bounce). If so, it rejects the message, otherwise it allows the > message to be delivered to you. > > In essence, only messages which can be replied to will be allowed > through, which makes a lot of sense to me. This would significantly > cut down on the amount of spam TMDA would have to process, and also > the number of returned confirmation requests. > > Does this make sense?
Sure. But qmail doesn't work that way, does it? You can't reverse SMTP confirm an email address on a qmail server, can you? I don't think the reverse verification process would ever work against a qmail MTA since the bounce doesn't happen at the SMTP conversation level. (Or does it? Maybe I'm confused?) > >> I still think it would be desirable to attempt to determine whether >> a bounce is an auto-responder or a bounce at the TMDA level. > > I disagree, since as I explained, this is only reliably done at the > MTA level. You'll inevitably lose legitimate mail if you attempt > otherwise. Not only that, but it's more efficiently done at the MTA > level as well since the verification process would be much less > expensive there. I think the expense is arguable. But you're probably right since TMDA is written in Python and the MTA is written in C. Let's talk hypothetically here: If I implement some Python code in a professional manner that effectively distinguishes between autoresponders and bounces, but is a totally optional feature, would you include it? -- Jesse Guardiani, Systems Administrator WingNET Internet Services, P.O. Box 2605 // Cleveland, TN 37320-2605 423-559-LINK (v) 423-559-5145 (f) http://www.wingnet.net We are actively looking for companies that do a lot of long distance faxing and want to cut their long distance bill by up to 50%. Contact [EMAIL PROTECTED] for more info. _________________________________________________ tmda-workers mailing list ([EMAIL PROTECTED]) http://tmda.net/lists/listinfo/tmda-workers
