Signature selection by rule
It's great that Airmail Mac supports multiple signatures.
It would be awesome if we could create a rule, or rules, that selected which signature to insert.
This way, we could use the "official" signature for outgoing emails to non-company recipients, and the "informal" signature for internal emails and friends.
What defines "outgoing", "internal", and "friends"? Well, that's what the rules are for -- each of us can have different meanings for those concepts.
Marc Boegem commented
rule selection would be great, but maybe just bind it to domainname would already do the job