This is good advice. We've been sending emails like this for a long time. The method is fairly low tech. Pull list of new customers > file.txt and then newcusto

This is good advice. We've been sending emails like this for a long time. The method is fairly low tech. Pull list of new customers > file.txt and then newcustomer.sh < file.txt Most importantly though a few points. Even if you aren't doing a personal email (because it might not scale), even if it's not suppose to be personal make sure to have it come from a real person where if someone has an issue they feel that if they write back a real person will read what they say. Of course if you have 29 million customers this might not apply (say free product) but then again you probably won't be reading HN right now anyway. Separately, nothing is a bigger turn off (to me) that getting a letter from a company appearing to care but not being signed by anyone other than "support team" or being signed by a person who has a non person sounding email address.