I'm trying to display a long barcode in an email.
All email clients handle short barcodes (in this format) perfectly however, when the barcode is longer, all Outlook clients ignore the 50px height and instead elongate the barcode. See screenshot.


Here is the code used to generate the emails seen in the screenshot Code.
I've tried adding line-height, mso-line-height-rule, table height, border=“0”, cellpadding=“0”, cellspacing=“0” etc.. but still no joy.

What do I need to change in order for Outlook to maintain the 50px height, no matter the width?