On 9/12/10 9:21 AM Giles Coochey wrote: > I don't know if this is complete, but you could try the following: > > # list of authentication mechanisms > O AuthMechanisms=EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN > > # Authentication realm > #O AuthRealm > > # default authentication information for outgoing connections > #O DefaultAuthInfo=/etc/mail/default-auth-info > > # SMTP AUTH flags > O AuthOptions=A p > > # SMTP AUTH maximum encryption strength > #O AuthMaxBits Hi, thanks, I inserted into sendmail.cf and restarted sendmail. '250-AUTH' still missing [root at mail mail]# telnet localhost 25 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. 220 mail.tfe.at ESMTP Sendmail 8.13.8/8.13.8; Sun, 12 Sep 2010 09:29:40 +0200 ehlo localhost 250-mail.tfe.at Hello tfefw1.tfe.local [127.0.0.1], pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-8BITMIME 250-SIZE 250-DSN 250-ETRN 250-DELIVERBY 250 HELP quit But, when I'm trying to send an email, the user still becames: Relaying denied. Proper authentication required. Before SASL, the user becomes only "Relaying denied" In Outlook 2003 in Email Preferences, the authentication for smtp is activ. "the outgoing server (SMTP) needed Authentification - same entries as the Incoming Server" same UID and password on outgoing and incoming Server. I love it on Sunday to work ;-( many thanks Richard