Setup Comcast as Relay Host for Postfix Mail.

root@donkey:~# grep -ir “smtp.comcast.net” /etc/
Binary file /etc/postfix/sasl_passwd.db matches
/etc/postfix/main.cf:relayhost = [smtp.comcast.net]:587
/etc/postfix/sasl_passwd:smtp.comcast.net < username >:< password >

Restart postfix.

!!Run this after modifiying sasl_passwd file

[root@mail postfix]# postmap hash:/etc/postfix/sasl_passwd

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