Email signature issues

Hi r/applehelp!

I'm having an issue regarding email signatures. I spent all this time creating an HTML based signature on my macbook (images attached below) and I think looks great when viewed on my laptop.

However, when the same email is viewed on an iphone, the sizing and spacing of the signature is off.

Anyone have an suggestions?

The first image is the way it should appear.

http://imgur.com/a/TqsFT

Thanks in advance