> On May 15, 2018, at 11:38 AM, Stefan Bauer <cubew...@googlemail.com> wrote: > > I can not think of a way to achieve this.
It is unclear what combination of criteria you want to use. What naïvely makes sense to me is that the client hosts in question are to be restricted to a particular sender address and to particular recipient domains. If so: main.cf: cidr = cidr:${config_directory}/ texthash = texthash:${config_directory}/ smtpd_client_restrictions = check_client_access ${cidr}client.cidr smtpd_restriction_classes = restricted_sender, restricted_rcpt restricted_sender = check_sender_access ${texthash}restricted-sender restricted_rcpt = check_recipient_access ${texthash}restricted-rcpt client.cidr: 192.0.2.1 restricted_sender restricted-sender: lu...@example.com restricted_rcpt, reject restricted-rcpt: example.org OK example.net OK example.edu OK Restriction classes can nest. -- Viktor.