Frank Ellermann wrote: > Eliot Lear wrote: > > >> I would be curious as to what needs "fixing" before it >> becomes a full standard >> > > The issues you find when you enter "2616" in the form at > http://www.rfc-editor.org/errata.html That sends you to > the outsourced http://purl.org/NET/http-errata > I now understand what you mean by outsourced. Most of these comments are truly editorial in nature, but that happens with FULL standards as well. See, for instance, 3414. >> Long hard work went into 2821 to correct known problems. >> > > Try the URL mentioned above and enter 2821. Some issues > fixed in the 2821bis draft, some missing, others are not > formally listed as errata, but you could find them in the > SMTP list archive (some weeks in 2005). > All of those are typos that people can work around without great difficulty. However, the below is not: > You've to read 2821 very often to find the most important > point between the lines, not mentioned clearly: _Never_ > accept mail unless you're sure that you can deliver it or > bounce it to the originator (which is today rarely related > to anything you see in the MAIL FROM). > > Otherwise, following the official 2821 rules, what you do > would be net abuse by design: Either you drop accepted > mail silently, or you bounce it to innocent bystanders. > > Unlike the old 821 SMTP, where it still worked as designed. > Of course 2821 couldn't fix 1123 5.3.6(a) anymore, but at > least 2821bis has to document it very clearly. > > Between the lines, "let's assume the MAIL FROM is related > to the originator", won't fly, that's not true anymore for > several years now. > There are many instances when an MTA can and should accept mail when it is not known to be deliverable. The most obvious example is when it is acting as an MSA. And I do not understand why you believe that it is rarely if ever related to the originator. It is certainly the case for nearly every mail I send or receive. The only question is who is the originator in the case of mailing lists, and that is well covered. Mailing lists SHOULD modify the mail from because the originator in those cases may have no responsibility for having sent the mail to the address that caused the error. Are you saying that RFC 2821 inadvertently perturbs this behavior? Eliot _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf