To verify aliases and whether mail can be delivered to a given recipient:
The command displays the aliases and identifies the final address as deliverable or not.
Here is an example of the output:
% /usr/lib/sendmail -v -bv sandy sandy... aliased to ssmith ssmith... aliased to sandy@phoenix sandy@phoenix... deliverable: mailer esmtp, host phoenix, user sandy@phoenix.eng.acme.com % |
You should take extra care to avoid loops and inconsistent databases when both local and domain-wide aliases are used. Be especially careful when you move a user from one system to another to avoid creating alias loops.