On Fri, Sep 13, 2024 at 10:50 AM Wietse Venema via Postfix-users < postfix-users@postfix.org> wrote:
> Dan Lists via Postfix-users: > > I have a small email relay server that is used to allow IOT devices to > send > > email. Some of those devices do not do authentication. I'd like to > > restrict the sender domain based on the IP. > > > > I'm looking for something like smtpd_sender_login_maps, but for client > IPs. > > There is no IP-based analogon for smtpd_sender_login_mapss, > due to lack of demand. > > If you don't have a huge number of such IP addresses, perhaps a > plugin with https://www.postfwd.org/ can do this. > > main.cf: > smtpd_sender_restrictions = check_policy_service inet:127.0.0.1:12345 > > Make sure that this will not affect the services for submission > (port 587) and submissions (port 465) in master.cf. They should > look like: > > master.cf: > submission inet n - n - - smtpd > ... > -o smtpd_sender_restrictions= > ... > submissions inet n - n - - smtpd > ... > -o smtpd_sender_restrictions= > ... > > Alternatively, milter-regex may be able to do this. > > Wietse > Thanks for the information. I was hoping to avoid using a policy daemon. I'll have a look at postfwd and milter-regex.
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