hello, in our postfix setup we use virtual_alias_maps to build some simple mailing-/distribution lists. now we want to reject every mail to a list where the sender is not a member of the list.
example: virtual_alias_maps li...@domaina.tld us...@domain1.tld us...@domain1.tld us...@domain1.tld li...@domainb.tld us...@domain2.tld us...@domain2.tld us...@domain2.tld us...@domain1.tld is allowed to send to li...@domaina.tld but not to send to li...@domainb.tld us...@domain2.tld is allowed to send to li...@domainb.tld but not to send to li...@domaina.tld unknownu...@unknowndomain.tld is allowed to send to us...@domainx.tld but not to li...@domainx.tld to accomplish this i found http://www.postfix.org/RESTRICTION_CLASS_README.html#internal and it seems to work. but im not sure how this will scale with a greater amount of lists/members and if it would be a better decision to use some policy daemon to do this stuff. any recommendations? thanks for you help! heiko
