Is there a solution for difference in letter-spacing between different OutLook clients?

I've declared letter-spacing: -0.48px; for a text nested in span.

On OutLook 2011/2016/Gmail/other clients the letter-spacing looks fine, but on OutLook 2007/2010/2013 it's much bigger.

Have anyone struggled with a similar problem?

I would be grateful for the help.