Mail signatures not appearing in dropdown

I had some issues with signatures after the upgrade, but I put that down to other issues. To solve my problem of signatures not appearing I took the following actions within Mail>Preferences>Signatures:

1. dragged the signature(s) I wanted to the accounts I wanted
2. highlighted the account where I wanted the signature to appear, and used the drop down box "Choose Signature" to select the default signature I wanted for that account
3. performed this task for all other accounts where I wished for a signature to appear

I now see relevant signatures by default when I compose an email.

Smeds128 wrote:

dragging them to other accounts got them back in the dropdown. Thanks!

Yes, that is the customary fix.

Probably best to mark the solution as 'fixed' so others with the same issue can see.

I suspect there have been some changes I can't remember in this area since El Crapitan. Since you run multiple accounts you are about to discover the "helpful" new aberration that means, if you have selected "Use best account" for sending, it will choose the account that corresponds to the domain of the first recipient to send from if the receiving domain matches one of your sending domains.

That's hard even to explain, It messes with your head when it does it!