Hi Dan, thanks for the pointer Custom rules are the equivalent of having your head spin through a tumble-dryer ... but they work:
SLocal_check_rcpt # check if sender is in local domains # if yes, accept # if not, recipient has to be local, else reject R$* $: $1 $| $>3 $&f R$* $| <> $@ OK <> is always ok R$* $| $*<@$=w.> $@ OK u...@local-host-name is ok R$* $| $* $: $1 any other user gets checked R$* $: $>3 $1 check recipient R$+<@$=w.> $@ OK recipient local? ok. this seems to be incoming R$+<@$+> $#error $@ 5.1.8 $: "551 Invalid sender domain" thx /markus Dan Harnett wrote: > On Sun, Jun 21, 2009 at 05:42:22PM +0200, Markus Wernig wrote: >> I have sendmail on 4.4 as MX and relay for outgoing mail using smtp >> auth. Now some users started using arbitrary from: addresses in their >> mail clients. I would like to restrict those sender addresses to the >> local domains, i.e. allow them to send mail from u...@my.domain or >> u...@my.other.domain, and reject their mails from u...@foreign.domain, >> preferably during the smtp dialog between MUA and sendmail. >> >> I've searched the sendmail docs and google, but can't find how to do >> this. Is it possible at all? > > Without modifying rulesets or running multiple instances of sendmail, I > think the simplest way is to use milter-regex. You can even match the > authenticated username against specific envelope senders rather than any > local domain. Otherwise, you're probably looking at implementing > something similar to this[1] in your configuration file. > > [1] http://www.sendmail.org/~ca/email/restrict.html
