On Thu, Nov 21, 2013 at 9:08 PM, Lists <lists at benjamindsmith.com> wrote: > How to get postfix working on CentOS 6 and Comcast. Recently, they've > changed their policies regards email relay and require authentication > even to send email. (they no longer use IP address ranges, presumably in > an attempt to curb outgoing SPAM) > Requiring auth is how it should be. <tangent> Now if Comcast would provide IMAP access instead of just POP3 to customers... </tangent> > > I didn't see an updated howto anywhere on the Interwebs, thought I'd > point out what I had to do. The part that had me stumped for longer than > I care to admit was having to install cyrus-sasl-plain rpm - EL5 > apparently had that installed as part of the cyrus-sasl package. > I've seen write-ups for relaying mail through Gmail using Postfix. Thanks for sharing. > > 1) yum install postfix cyrus-sasl-plain; > # note that cyrus-sasl-plain is NOT installed by default but is needed > by this config. > > 2) Create file /etc/postfix/passwords. Replace "USERNAME" with your user > name, and > "password" with your password. Note: your username is typically your > email address without the domain name. > #---------------------------- > smtp.comcast.net:587 USERNAME:password > smtp.comcast.net USERNAME at comcast.net:password > #---------------------------- > > 3) makemap passwords; > > 4) Edit /etc/postfix/main.cf > #---------------------------- > relayhost = [smtp.comcast.net]:587 > smtpd_sasl_auth_enable = yes > smtp_sasl_auth_enable = yes > smtp_sasl_password_maps = hash:/etc/postfix/passwords > # note that with no security options on, we're using sasl-plain > installed above. > smtp_sasl_security_options = > # You might need this, you may not. > #sender_canonical_maps = regexp:/etc/postfix/sender_rewrite > #---------------------------- > > 5) Create file /etc/postfix/sender_rewrite. Note that not all Comcast > customers need this, I didn't when I authenticated as above. Obviously, > replace "USERNAME" with your user name. > #---------------------------- > /^([^@]*)@.*$/ USERNAME at comcast.net > #---------------------------- > > 6) service postfix stop; sleep 5; service postfix start > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- ---~~.~~--- Mike // SilverTip257 //