Re: auth relay limitting

On 22/01/2025 18:18, Claus Aßmann wrote:

none  wrote:
 

Currently when a user is authenticated it can send messages with any
  From (and envelope ?). I would like to limit this to only addresses
that the user is configured to receive on.
>
How would I go about implementing such a thing?

 A custom ruleset.
 You might find some examples on "the 'net".

You have maybe a link to a practical example? I have the impression there is not even a check_sender
https://www.sendmail.org/~ca/email/rcpt_old.html
How should this be rewritten so it looks up the from address in the virtual user table so it compares sendmailMTAMapValue with the auth?
R$+ $: $>3 $1
R$+ $: $(dequote $1 $)
R$- $@ ok to here
R$* % $* $: relay attempt
R$* @ $* < @ $* . > $: relay attempt
R$+ < @ $=w . > $@ ok to here
R$+ < @ $={RelayTo} . > $@ ok allow relay to there
R$+ $: $(dequote "" $&{client_addr} $)
R0 $@ ok client_addr is 0 for sendmail -bs
R$={LocalIP}.$* $@ ok from here
R$* $#error $@ 5.7.1 $: "571 we do not support relaying"