> On May 18, 2018, at 11:03 AM, Paul Richards <paulrichards...@gmail.com> wrote: > > #in /etc/postfix/domain_copy.conf > @mydomain.edu @host1.mydomain.edu @host2.mydomain.edu
This sort-of-works provided each host does not forward mail for @<thishost>.mydomain.edu to the other, but breaks recipient validation if implemented as a wildcard. Avoid wildcard virtual alias maps. More importantly of course, per Wietse's note the semantics of duplicate delivery are unfortunate, so replicate at the mailstore level. -- Viktor.