LOR sent from gmail account and not on letterhead

[quietman]

Hello,

I am applying to MPP/MPA programs. One person who I feel would be able to write me a very strong letter (2 years my professional supervisor + we worked together on volunteer endeavors) is no longer employed due to family commitments.

As a result, they don't have a company email (they use gmail) and would not be able to write a LOR on company letterhead. If they explain their situation in the letter is it okay for me to use them as a reference, or will the letter still lack credibility?

Thank you

Edited May 25, 2016 by quietman