North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: IETF SMTP Working Group Proposal at smtpng.org
Brad Knowles <[email protected]> writes: > At 11:40 AM +0100 2002/08/23, Martin Cooper wrote: > > > How does it break mailing-lists? If the list sets the envelope sender > > to <[email protected]> creating a MAIL-FROM shouldn't > > be a problem. > > You may be surprised to discover this, but most mailing lists are > not proper mailing lists and are not managed with proper mailing list > management software. Most mailing lists are actually handled as > aliases, and therefore do not modify the envelope sender address. > > > The only problem I can see is what to do about bounces > > (i.e. with a null envelope sender) - guess you could use header From > > instead maybe. > > Actually, this is one area that the paper addresses. repudiated(mailfrom, ipsource) = { (lhs, rhs) = parse_addr(mailfrom); // handle "MAIL FROM:<>" somehow mxset = get_mx("MAIL-FROM" "." rhs); if (mxset == NULL) return nonrepudiated; ^^^^^^^^^^^^^^^^^^^^ OK - but unconditionally permitting null-return paths means that spammers can drive a coach and horses through the hole it leaves. :-( Martin
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