if the email is to be refused, it is most of the time (if not always) refused just after MAIL FROM: and RCPT TO: commands, i.e. before your 1Mb attachment is sent to the server
if the email is to be refused, it is most of the time (if not always) refused
just after MAIL FROM: and RCPT TO: commands, i.e. before your 1Mb attachment is
sent to the server