Sendmail

Enable smtp on all interfaces.

/etc/mail/sendmail.cf
O DaemonPortOptions=Port=smtp, Name=MTA

Usermappings.

/etc/mail/virtusertable

anden@halfface.se               bjorklun
andreas.bjorklund@halfface.se   bjorklun
stannaks@halfface.se            stannaks
none@halfface.se                error:nouser 550 No such user here
wrong@halfface.se               error:5.7.0:550 Address invalid
@halfface.se                    bjorklun
anna-karin@sivberg.se           stannaks
@sivberg.se                     stannaks
@mobbad.                        bjorklun
@anden.homeip.net               bjorklun

----
aliases for your host
<verbatim>
/etc/mail/local-host-names

anden.homeip.net
www.halfface.se
halfface.se
www.mobbad.nu
mobbad.nu
www.sivberg.se
sivberg.se

----
Access rights. Who can send mail and username and password at www.bredband.net smtp server.
<verbatim>
/etc/mail/access

localhost.localdomain           RELAY
localhost                       RELAY
127.0.0.1                       RELAY
192.168.2.1                     RELAY
192.168.3.1                     RELAY
AuthInfo:smtp.bredband.net "U:b586378" "I:b586378" "P:??????" "M:LOGIN PLAIN"

----
Forward a copy of email.

~/.forward

\bjorklun
andreas.bjorklund@infineon.com