On Thu, May 20, 2021 at 12:52:38PM -0500, Noel Jones wrote: > As the docs say, the brackets disable MX lookups, not DNS lookups. > > Sounds like you should read > http://www.postfix.org/postconf.5.html#smtp_host_lookup > and probably use "dns, native"
Thanks Noel, that's the right answer. I just want add the below caution: Care is appropriate when native lookups are desired for just a particular destination, with most (or at least some) mail delivered to the public Internet. In such cases, the use of "dns, native" or just "native" should be specified in master.cf for a custom smtp transport that is dedicated for non-DNS deliveries, with the default of "dns" alone continuting to be used for mail going out the Internet at large. -- Viktor.