Hello guys, Here is my goal: send around 2k emails a day (but I also need to be able to send 10k + a day after the prototype phase of my project) to a list I randomly gathered on the web. I have good Php / Mysql / Perl etc... knowledge and I would like to know if the following method will be working: 1°) Get fresh, non-blacklisted emails accounts from Yahoo (or other ?) -> about 50. 2°) Use a PHP class to send emails through SMTP via my accounts (I am testing it with Swiftmailer ATM). 3°) Send emails through SMTP on a rotating mode (the accounts are stored in DB and randomly selected based on the number of emails they've already sent in the last hours). All of this is hosted on a dedicated server, on 1 IP. I will clean up my list before starting the mass sending. I tested it on 1 account (and it works, of course), but before scaling (by creating or buying some other accounts) I would like to know if I am doing it right ? If this is too technical, we can discuss it in PM. Thanks a lot everybody and if I end up building something that can be useful to others I will post the complete method in a separated thread.