Wael MANAI: > What do you mean "security software"? It's postfix which adds > 250-PIPELINING...
You are mistaken. The "security" software sends 250 whatever 250-PIPELINING 552 whatever The 250-PIPELINING is NOT PART OF THE EHLO RESPONSE. In RFC 5321, section "4.2.1. Reply Code Severities and Theory" The format for multiline replies requires that every line, except the last, begin with the reply code, followed immediately by a hyphen, "-" (also known as minus), followed by text. The last line will begin with the reply code, followed immediately by <SP>, optionally some text, and <CRLF>. As noted above, servers SHOULD send the <SP> if subsequent text is not sent, but clients MUST be prepared for it to be omitted. Wietse