On Sun, Dec 05, 2021, Slavko via mailop wrote: > I think a little about it, but i cannot find other way than do not use > To: header at all, which will be penalized in my anti-spam SW latter.
"What's the problem you are trying to solve?" Is this about the differences between envelope and header(s)? > My understanding the To: header syntax is, that it must be qualified, > but then there is no reason to not use that address in RCPT command > too. Or i miss something? The RFCs don't care much about your "anti-spam SW". AFAICT this was done as the most simple way to reach the postmaster at a host -- reducing the chance of being rejected due to some misconfiguration where a host does not accept mail for its own name or its own MX. (for more detail it's probably best to check the history of that special treatment in the ietf-smtp mailing list?) Of course there are those systems which are misconfigured in other ways as comcast demonstrates. -- Address is valid for this mailing list only, please do not reply to it direcly, but to the list. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
