When writing a business letter for someone else do you sign your own name followed by "for and on behalf of" your colleague's name or do you miss out your name and just put "for and on behalf of" their name?
I usually go into my profile and change myself to the person I am sending from - it then says Joe Bloggs or whatever at the top then sent by your own name - saves all the mucking about - email is supposed to be informal - if you want to be formal, then type a letter and send it as an attachment.
Since pp stands for "per procurationem" which means "on behalf of" it goes before your colleague's name (not your own name as oneeyedvic advises). And what is wrong with using pp in an e-mail?
To answer chakka35, I usually associate pp with a signature not a typed name, so it didn't seem appropriate. Also, the person I was writing to is foreign so I'm not sure if pp translates globally - but that's another question!
I had always thoght of pp as standing for per pro, which I assumed was short for per procurationem.
But Chambers gives ( under 'pp') separate definitions for the two phrases, viz: