SUMMARY: - How to configure procmail (or something else) to "use authentication" to send mail to smtp.broadband.rogers.com. - When sending mail, I get "530 authentication required" errors in /var/log/maillog. - I've tried using the instructions in the file README-Postfix-SASL-RedHat.txt - Note: Thunderbird works but I don't know how to translate it's configuration to procmail. - I'm using CenOS 5.2 (similar to RHEL 5.2). DETAILS: I'm trying to send mail from my home linux machine to my account on Rogers.com without using Thunderbird or a web page. I just want to send using mutt or even "date | mail rjrenaud [ at ] rogers [ dot ] com". When I'm composing mail, I want to use full featured editor like vim or emacs. I'm trying to use postfix although if something else works, that would be fine. Rogers gives me the following information: Here are the basic server settings for Rogers Yahoo! Mail: Incoming Mail (POP3) Server: pop.broadband.rogers.com (No SSL, port: 110) Outgoing Mail (SMTP) Server: smtp.broadband.rogers.com (No SSL, port: 25 or 587, use authentication) Receiving Works: I can pop my mail using fetchmail or getmail. They work nicely with my procmail filters. Sending is the problem: When sending mail, I get "530 authentication required" errors in /var/log/maillog. Nov 28 12:58:18 rjrlap1 postfix/pickup[22967]: 3E6AE20A59D: uid=501 from=<rjrenaud> Nov 28 12:58:18 rjrlap1 postfix/cleanup[23119]: 3E6AE20A59D: message-id=<20081128175818 [ dot ] 3E6AE20A59D [ at ] cpe0050180174de-cm0019475e1ed2 [ dot ] cpe [ dot ] net [ dot ] cable [ dot ] rogers [ dot ] com> Nov 28 12:58:18 rjrlap1 postfix/qmgr[22968]: 3E6AE20A59D: from=<rjrenaud [ at ] cpe0050180174de-cm0019475e1ed2 [ dot ] cpe [ dot ] net [ dot ] cable [ dot ] rogers [ dot ] com>, size=460, nrcpt=1 (queue active) Nov 28 12:58:18 rjrlap1 postfix/smtp[23121]: 3E6AE20A59D: to=<rjrenaud [ at ] rogers [ dot ] com>, relay=smtp.broadband.rogers.com[206.190.36.18]:25, delay=0.28, delays=0.05/0.02/0.17/0.04, dsn=4.0.0, status=SOFTBOUNCE (host smtp.broadband.rogers.com[206.190.36.18] said: 530 authentication required - for help go to http://help.yahoo.com/help/us/mail/pop/pop-11.html (in reply to MAIL FROM command)) The number of options and features of postfix and sendmail are working to my detriment here. At the moment, I just need something that works. What am I missing? I've tried several HOWTO's but am currently using the one in the file /usr/share/doc/postfix-2.3.3/README-Postfix-SASL-RedHat.txt I've done the following: file /etc/postfix/main.cf myhostname = cpe0050180174de-cm0019475e1ed2.cpe.net.cable.rogers.com relayhost = [smtp.broadband.rogers.com] smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination # Might not need the following two but setting them didn't seem to help. smtpd_delay_reject = yes smtpd_client_restrictions = permit_sasl_authenticated root% saslpasswd2 -u `postconf -h myhostname` -c rjrenaud The file /etc/sasldb2 was generated with my password info inside. Rrjrlap1% strings sasldb2 my-password rjrenaud cpe0050180174de-cm0019475e1ed2.cpe.net.cable.rogers.com userPassword You'll need to set permissions on the SASL password database so that the Postfix daemons can read it: chgrp postfix /etc/sasldb2 chmod g+r /etc/sasldb2 many thanks roland