[statictype]

Incidentally, Amazon SES has limits on how many mails you can send a second - even after your account is confirmed by them. You can see this limit on your control panel. Mine shows around 5 mails per second.

So you will have to add some kind of throttling to make it work.

[reitzensteinm]

Yep, which was a big reason why I did it the way it was. I was paranoid that I'd make a slip up in the throttling code and send too many emails (I guess they actually check it over a 10 or 60 second window), and the rest of the batch wouldn't go through properly.