I appreciate that the filter does not distinguish between domains. Nonetheless, I see different filtering behavior for email destined for the domain listed in mydomain which also have entries in /etc/aliases vs. the domains listed as virtual domains.
Sent from my TI-99/4A > On Dec 14, 2017, at 06:58, Wietse Venema <wie...@porcupine.org> wrote: > > Justin Peavey: >> >> Thanks for the reply, unfortunately the approach doesn?t seem to work for >> me. It appears that that the regardless of the smtp_recipient_restrictions >> setting, that any addresses listed in /etc/aliases addressed to $mydomain is >> bypassing any blocking/filtering. Is this expected behavior? >> > > Your observation is flawed, or you made a mistake. The filter below > does not distinguish between recipient domains. > > Wietse > >>> >>>> On Dec 10, 2017, at 4:22 PM, Wietse Venema <wie...@porcupine.org> wrote: >>>> >>>> Omniver: >>>>> I have a mail server receiving internet mail for my primary domain and >>>>> for a >>>>> few virtual domains. I'm having some spam issues with internet mail >>>>> coming >>>>> in for address@mydomain for addresses intended for use by local >>>>> tools/scripts which are listed in /etc/aliases. Any ideas on how can I >>>>> make >>>>> it that postfix accepts mail for these addressesI *only* if they were sent >>>>> by my mail server? >>>> >>>> A crude but simple solution: >>>> >>>> - Add the server's IP address to Postfix mynetworks. >>>> >>>> - Block some recipients if mail does not come from mynetworks: >>>> >>>> /etc/postfix/main.cf: >>>> smtpd_recipient_restrictions = >>>> permit_mynetworks >>>> check_recipient_access hash:/etc/postfix/recipient_access >>>> ... >>>> reject_unauth_destination >>>> ... >>>> >>>> /etc/postfix/recipient_access >>>> us...@example.com reject >>>> us...@example.com reject >>>> >>>> Crude because it adds the server to mynetworks. >>>> >>>> Wietse >>> >> >>
