Photo in email signature htm file showing too large in apple mail.

_Vogue wrote:

I've added my email signature (copied & pasted the htm. file) into the relevant field on apple mail and it's fine when inserted but as soon as I begin to write an email the images are huge.

Is there a way to fix this without having to resize the images or is that the only way?

Thanks!

I would simply resize the image.

Create and use email signatures in Mail on Mac - Apple Support