Email Text Gaps (Using Arial, Times New Roman or Verdana fonts)

Good day!

I'm having text "break" issues when going from desktop to mobile.  I believe I'm trying the "standard" fonts that would render correctly in various email platforms.  The examples below are Trebuchet, but the same thing happens when using the other three mentioned in the subject line.

Desktop on the left, mobile on the right.

Any suggestions?  Thanks in advance!

Cheers

Tim