Let's say I have a list of 40,000 emails and I want to send a newsletter to them. I do not want to send the newsletter all at once, instead I prefer to send out 4000 per day. It will be great to have an advanced schedule like this.
The benefits are: (1) we found the click rate is higher if we spread out the sending volume (2) we do not need large SES quota
Currently we have to manually split our large lists into a lot of smaller lists which is a big pain.