Fax Blast Service
A fax blast service is a company that is set up specifically to send advertisement spam messages to companies or people with fax machines. This is the same thing as an e-blast, really, with you sending out unsolicited messages over a fax machines, except unlike e-blasts, they are harder to block, because you have to block a specific number. Fax blasting, in the United States at least, is illegal. It was outlawed in 2005. You jerk. Seriously, there's no reason to annoy people with your mediocre product. How about you pay for a real advertisement, you dick.
But really, the Junk Fax Prevention Act of 2005 outlawed most forms of the junk fax, except for in a few circumstances which essentially negate the need for a fax blast service. The fax blast service best known in the US, fax.com, has been driven out of business thanks to massive lawsuits, and a bunch of other ones have been shut down as well. The loopholes in the JFPA are pretty tight. First, you need to have an established business relationship with anyone you send an advertisement, and then there has to be, on the first page, an opt-out clause meaning they would be taken out of your call database so you could no longer fax them. It's similar to the no-call list. At the minimum, if someone owning a fax machine decides to press charges, you will have to pay $500 as an absolute minimum per page. And don't think that going through a fax blast service gets you off the hook. You are still responsible for anything sent out advertising your company, and you can be pretty solidly thumped for messing with this.
In fact, there are very strict guidelines as to what you can and can't do with a fax blast service. For the most part, you just shouldn't do this. It's possible that you could legally spam a person a page or two, but they once the opt out, you can no longer contact them, or you will get nailed to the wall. So my suggestion is that you'd drop the Fax blast service (if you are in the United States, different countries have different laws, and other countries probably use fax machines a lot more than we do in the United States, so if you are outside the US or in the US and sending faxes out, then you may be able to get away by hiring a decent fax blast service. I know for a fact that faxes are bigger in China and India, and you know China, they never have Draconian laws), it's that you go through the wave of the future: spam e-mails. Faxes are quickly becoming an obsolete technology anyway.
E-mail blast services are easier to find online, and are much more insidious, because they are basically run through illegal and sketchy means. Seriously, you have to be a sleazy assbag to do any of this blasting, but I guess you wanted to spam fax someone, so I doubt your integrity is worth all that much. Basically, spam e-mails are gotten through viruses that plunder address books in affected computers or accounts, or through chat rooms and social networking sites. They are usually gotten clandestinely, unless the person signs up for a specific mailing list, in which case it is technically solicited, and therefore is not actually spam. In order to get an e-blast service, you just have to look online. There are plenty of e-blasters who will send out advertisements for you, and really, in these cases, the only service you are paying for is the use of their list in itself, rather than for the postage and labor rates as well, which is the case with junk mail and fax, all services that are relatively expensive. You may also have to pay a bit for the use of the servers.
Fax blast services, to sum up, are illegal in the United States, but if you are reading this elsewhere, you can still do it, depending on your countries laws. E-mail blasting is a much less reputable (if that's possible) thing to do, but they are cheaper, and laws to block spam e-mail have not been properly passed or implemented. You can still get away with it.