How do I add a logo to my signature? When I add it as a .gif in the signature box, it comes up twice when an email is sent with it.

I followed the directions in the signature box and dragged it from my desktop, but that didn't work.

I formatted the whole signature in Word, copied it and pasted it in the signature box - the logo still appeared twice when sent and my text lost its formatting.

I formatted the whole signature in TextEdit, copied it and pasted it in the signature box - the logo still appeared twice when sent and my text lost its formatting.

There must be a way to add a logo to a signature without it showing up twice?

Thank you.