I recently received a very formal wedding invitation. The invitation was tied with a bow on the front and had a small tag that read "Mr. & Mrs. Blank" on it. Underneath our names was the abbreviation E.S.M.

Does anyone know what that means or stands for?

The only thing I could find that was remotely close was "Express Specific Meal".

It could also be the logo for the company that made the invitation. I would suggest simply asking the sender what it means..

Usually it refers to the profesion or company that you are with!!!!!

Could it be the initals of the bride?

In spanish E.S.M. means "en sus manos" which translates to "in your hands" (like hand delivered)