John Schmitt: > I want to thank you and Viktor for replying. > > On Thu, Apr 08, 2010 at 07:18:38PM -0400, Wietse Venema wrote: > > John Schmitt: > [...] > > > Transcript of session follows. > > > > > > Out: 220 mymachine.mydomain.net ESMTP Postfix > > > In: HELO mymachine > > > Out: 250 mymachine.mydomain.net > > > In: MAIL FROM:<> > > > Out: 250 2.1.0 Ok > > > In: RCPT TO:<"???B?\" <olpcxcqkkqc...@aol.com>> > > > Out: 501 5.1.3 Bad recipient address syntax
Some software author assumes that it can take an address form that is valid in message headers: To: "full name" <u...@example.com> and then use that same form in RCPT TO commands. The correct RCPT TO command syntax is: RCPT TO:<u...@example.com> as defined in RFC documents 20 years ago. Yes, the software's quoting algorithm is busted, too. Wietse