>>>> 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... "smtpd_use_tls = no" in /etc/postfix/main.cf -- ____________________________________________________________________ D o m i n i k S k ł a d a n o w s k i