On Tue, 6 Sep 2005, Dominik Skadanowski wrote: >>> I have mail server on CentOS 4.1. Sasl authorization for SMTP is >>> enabled. Thunderbird sends mail, but Outlook get an error 554, >>> Relay access denied, error number 0x800CCC79 >>> >>> Outlook has a login and password for SMTP enabled. >>> >>> It is strange, because there is no any sign of authorize in >>> maillog when Outlook try to send mail. >> >> It's my experience that the most recent versions of Outlook (the >> one bundled with MS Office) no longer handle TLS gracefully. I've >> had to reconfigure Outlook to send with straight SSL over port 465. > > I have disabled TLS and still the same. You disabled it where? On the client? On the server? Chances are, there are tweaks necessary on both sides: client -> use SSL and port 465 server -> open SSL-only (smtps) port 465 At this point, however, I'll have to let a real Postfix admin answer questions... -- Paul Heinlein <> heinlein@xxxxxxxxxx <> www.madboa.com