Thanks for this very helpful post, which I've used to set up some mail merge letters with digital signatures.

I've run into a problem, though, in that the images vanish when sent as attachments - presumably because the d-switch means they aren't saved. However, dropping the d-switch seems to prevent them being refreshed automatically.

I'm a bit confused because point 3 of the explanation suggests this won't be a problem.

Anyone have ideas to get around this behaviour?