Sendmail Config

F{LocalDomains} /etc/mail/LocalDomains
F{LocalIP} /etc/mail/LocalIP

Scheck_mail
# ruleset 3 makes the input into a normal e-mail address (user<@blaat.nl.>)
R$*                     $: $>3 $1

# first: get client addr
R$+                     $: $(dequote "" $&{client_addr} $) $| $1
# no client_addr, smmsp?
R0 $| $*                $: $>"check_mail2" $1
# client_addr in /etc/mail/LocalIP? then go to SLocal_check_mail
R$={LocalIP}$* $| $*    $: $1 $| $>"Local_check_mail" $1

# mail from user@domain, domain in /etc/mail/LocalDomains? Then reject, because it is not a local IP
R$*<@$={LocalDomains}.>$*        $#error $@ 5.7.1 $: "550 We don't accept junk mail from our own domains"
R$*<@$={LocalDomains}>$*         $#error $@ 5.7.1 $: "550 We don't accept junk mail from our own domains"

SLocal_check_mail
Scheck_mail2
R$*                     $: $1 $| $>"Local_check_mail" $1
R$* $| $#$*             $#$2
R$* $| $*               $@ $>"Basic_check_mail" $1