I don't know, I get both recruiter emails as a hiring manager and as a potential hire. The majority them try to be familiar, each seems to fail with a different detail. Some guess my location incorrectly, or talk about a product launch from a competitor (attributing it to us) or get our industry wrong, or present skill-sets we don't need in a way that it describes them as being a core part of our architecture, or congratulates us on vague recent successes that could potentially apply to anyone. I had one last week that congratulated me on having a recent child (not the case) from I presume some badly matched social media profile with someone sharing a similar name. I get 2-10 of these a day and I really don't see many that take the time to actual do any research. It is clear most of form-fills, based on some kind of automated data collection or just tossing a wide net.
