You can also use the emailing service from JPAY to write to Freddie. 

Go to JPAY  and input the details requested.

Freddie will be able to email you back.  When Freddie writes you back, you will receive a notification from Jpay that you have mail in your Jpay inbox.

Using Jpay is faster than snail mail, and also much cheaper for both Freddie and pen friends.