> From: Frank DeChellis
> I have my SMTP restrict to hosts listed in relay_from_hosts, that works
> simply enough.
>
> When I try to restrict senders by domain
What do you mean under "restrict senders by domain"? Please elaborate.
> Then later I added the 2 lines that are bold:
This mailing list is plaintext only, bold isn't shown.
> acl_check_rcpt:
>
> accept hosts = :
> deny local_parts = ^.*[@%!/|]
> accept local_parts = postmaster
> domains = +local_domains
> accept domains = /usr/pkg/etc/exim/never_filter_domains
The "accept domains" is a bad idea. Don't do that.
It means that if a spammer writes one of these domains in MAIL FROM
(spammers almost always lie there) then your server sends out that spam
to as many recipients as the spammer specified. Instead:
require verify = sender
accept hosts = +relay_from_hosts
control = submission/domain=
accept authenticated = *
control = submission/domain=
(checking RBLs here)
If you want to forbid your authenticated users to send messages
with any sender email address and allow only some domains in
sender email address then insert one line after "accept authenticated":
accept authenticated = *
domains = +sender_domains
control = submission/domain=
