Hi Ann-Marie --
Have you looked into Doximity?
They have a free e-fax number for you when you sign up, and incoming and outgoing faxing are easy and encrypted to HIPPA standards. I don't know if there are volume limits, but I've been really happy with them.
Heather Brislen, MD, FACP
Lagom Health
tele 505.433.7745
fax 505.265.5199
A note about Dr. Brislen's E-Mail: E-Mail is used for routine, non-urgent communication only. Please take care NOT to include sensitive health information in email, and be aware than any health information is vulnerable to viewing by unapproved third parties.