I have tried to contact TrustFax via email today. This is part of the message when I send a note to sales@trustfax.com:
Hi. This is the qmail-send program at mcmail2.mcr.colo.comodo.net.
I’m afraid I wasn’t able to deliver your message to the following addresses.
This is a permanent error; I’ve given up. Sorry it didn’t work out.
I then looked for a fax number to just fax the message to them. Interestingly enough, a fax company does not have a fax number published that I can find.