To send a fax through email:
1) Create a new e-mail
2) Have the subject line set to “<to>@<your fax number>” without the quotes.
For example, to send a fax to Northwest Voip, the subject line should read "receiving fax number@6049436161” without the quotes
3) Attach a PDF file.
4) Send it to firstname.lastname@example.org
DISCLAIMER: You need to be added to an approved list with NorthWest Voip for this to work, please put in a ticket with IS to have this set up.