Thank you Wietse. That was very helpful and I believe I can get this done now.
—————————————————————————————— Andrew Grant Information Systems Administrator Email: andrew.gr...@caddock.com Caddock Electronics, Inc. High Performance Resistor Products Web: www.caddock.com 17271 North Umpqua Hwy. Roseburg, OR 97470 USA Ph: 541-496-0700 Ext 5544 Fax: 541-496-0479 On Jun 15, 2010, at 4:24 PM, Wietse Venema wrote: Andrew G. Grant: > I just got smtpd_sender_maps to work with smtpd_sender_restrictions > using reject_authenticated_sender_login_mismatch. > > While researching how that worked, I saw information indicating > that you could apply the reject_sender_login_mismatch to the > smtpd_recipient_restrictions. > > Can someone explain how that would work? I am picturing mail being > delivered to one of my users from the internet. How does my mail > server know if the sender, of a message from outside of my domain, > has a login mismatch? Thus is where you use reject_authenticated_sender_login_mismatch. Instead of using the imagination, this is what the manpage says: reject_authenticated_sender_login_mismatch Enforces the reject_sender_login_mismatch restriction for authenticated clients only. This feature is available in Postfix version 2.1 and later. And: reject_sender_login_mismatch Reject the request when $smtpd_sender_login_maps specifies an owner for the MAIL FROM address, but the client is not (SASL) logged in as that MAIL FROM address owner; or when the client is (SASL) logged in, but the client login name doesn't own the MAIL FROM address according to $smtpd_sender_login_maps. Wietse