sendmail auth - restrict user to local-host-names

[shrek-m at gmx.de]

>>>> http://www.sendmail.org/~ca/email/restrict.html    
>>>
>> http://www.sendmail.org/m4/intro.html
>> So place it at the end of the sendmail.mc.
>>
>> Don't edit the sendmail.cf!
>> When adding the LOCAL_RULESET to the sendmail.mc take care to use
>> tabstops between the LHS and RHS entries. So for the first line for
>> example
>>
>> R$*        <here are tabstops - no spaces>        $: $1 $| $>3 $&f
>
>
> thanks :-))
>
> # tail -18 sendmail.mc
> dnl MASQUERADE_DOMAIN(mydomain.lan)dnl
> MAILER(smtp)dnl
> MAILER(procmail)dnl
>
> LOCAL_CONFIG
> F{Internal}/etc/mail/intern.only
>
> LOCAL_RULESETS
> SLocal_check_rcpt
> dnl # get sender address and canonify it
> R$*                             $: $1 $| $>3 $&f
> R$* $| <>                       $@ OK           <> is always ok
> R$* $| $={Internal} <@$=w.>     $: $1           luser at local.host?
> R$* $| $={Internal}             $: $1           luser?
> R$* $| $*                       $@ OK           someone else
> R$*                             $: $>3 $1       check recipient
> R$+<@$=w.>                      $@ OK           local? ok
> R$+<@$+>                        $#error $@ 5.1.8 $: "551 sorry luser 
> your boss does not like you"
>
>
>
> $ cat intern.only
> dummy
> dau
> joe


apropos:

2 external adresses are allowed via /etc/aliases
support:   support at extern.domain
info:         info at extern.domain

# newaliases

bingo :-))
-- 
shrek-m