Don't buy that list!
It all sounds like a great deal, but it's not. Despite the promises of such data providers, this is junk data and will do you more harm than good. What we've typically found with this kind of data:
- Up to an 80% bounce rate, damaging future deliverability.
- Massively out of date - we tried contacting several supposed subscribers and found they hadn't worked at those companies for 10 years!
- Poor validation - addresses like "firstname.lastname@example.org?subject=" are blatantly harvested, suggesting the rest of the data is too.
- If they're harvested, they very probably contain spam traps that will poison the whole of your list and our service, resulting in all your future mail being blacklisted, blocked or consigned to spam folders. There is no way of spotting spam traps.
- No provenance: no IP addresses; date, time and how the address was obtained, date of last mailing. All are legal requirements.
- Long provenance chains: these lists are often obtained elsewhere from other list sellers. When data is passed around so much, it tends to suffer.
- No third-party authorisation - without explicit proof, chances are the subscribers did not provide explicit permission for their data to be resold, if they ever opted in at all.
- No additional data: decent list providers will usually be able to tell you accurately a person's name, company name, address, home number, and more.
- Low quality data: If data is provided (e.g. if it was obtained from survey sites), it will often contain uncleaned rubbish data, such as first names of 'asdf', swearing, hack attempts etc.
- Large lists are often sourced from survey sites who pay people (nominally, for example in some kind of loyalty points or discount coupons) to complete surveys. Such participants are usually in it for the points and not in the least bit interested in anything else.
- If recipients didn't really opt-in, it's extremely likely they will be disproportionately annoyed by messages from you, and tell others, twitter, spam reporting services and their ISPs all about it, dragging any brand credibility you had through the mud in a very public way.
- These lists are sold over and over again, meaning that anyone who does get mailed on it is probably pretty annoyed with their level of spam already.
- Bad providers typically don't ask for bounce data back, meaning they don't maintain these lists and quality will just get worse over time.
- While convictions are rare, if addresses have not been obtained legitimately, you can be liable for a fine of up to €12,000 per message, and jail time in some EU countries (which has happened for a single message in Spain and Germany)!
Many supposed marketers still fall for it and say, "well, I might get a few queries, which is worth £300, and I don't care about the rest", but this is exactly what spamming is. The net result is this; across-the board reduction in quality and performance for everyone.
A really simple approach before you spend any money with a list provider is to search for their name: if they are bad you'll find the search results are filled with scam reports and horror stories, so they're easy to spot. Even 'positive' reviews such as "the list only contained 20% bounces" should also set alarm bells ringing - a good legitimate list will have a bounce rate around 0.3%.
Growing and maintaining good quality lists is difficult and expensive, so don't expect to get such data cheap. As in many scenarios, if it seems too good to be true, it's probably a scam. There are good list providers, but you won't find them in the same cost ballpark as these bottom-feeders.
We've decided to name names on this, so here are some providers we've seen bad data from: