The discussion was about rejecting the following SMTP session:
HELO domain.com MAIL FROM:<[EMAIL PROTECTED]> RCPT TO:<[EMAIL PROTECTED]> DATA . QUIT
i.e. nothing in the DATA section whatsoever. This isn't "legitimate mail" in any sense whatsoever (since there's no mail there, only an envelope). It's completely illegitimate. It violates RFC 2822. It communicates nothing.
Except that ezmlm _will_ accept that envelope-only message to administrative addresses (like a moderate reply). So, technically speaking, the envelope alone contains enough information for at least one purpose, hence shouldn't be blocked outright without recourse, which is why I agree with Michael that this belongs in a plugin. And the slightly amended check_basicheaders I added to CVS does exactly this.
John
