fax

I currently use (but do not recommend) efax to receive faxes. It gives me a phone number which I can give out as my fax number. People can then send a fax to me from any fax machine. When efax receives the fax, they email it to me.

(This is the opposite of people who want to receive email via fax, which I call email2fax.)

However, the vast majority of the faxes I get from my efax account are junk faxes. People trying to sell me a mortgage refinancing, etc.

Here is how email to fax should work:

1. Allow me to block all faxes from private or blocked lines. (If someone I know needs to fax me from a blocked line, I can login or call to temporarily allow it.)
2. Send the fax as a set of JPG images in the body of the email, so they can be rendered in the email message by my email client. Additionally, provide an encoded link to a PDF version of the fax should I want that.
3. Do not put lots of blah blah in the email body. Please be concise, and just get right to the fax.
4. Include a "Spam" button; when clicked, it adds the sender to my blacklist, and also improves the system wide spam filtering.