Hector Santos wrote:
RFC 2476, HTMLized copy here:If there is one possible SMTP command to add to the specs, it would bethisdo you have something I can read?idea: non-server based MTA clients (local machine clients) use: MAIL FROM: <>> server based MTA clients use: > > RETURN PATH: <> > > This will give server software to decide if they want to VALIDATE the > return path or not against DNS mx records. There is an IETF SUBMIT protocol which is recommended to be used for local clients instead of SMTP, which makes this point moot.