We have a high-end mail delivery infrastructure allowing us to quickly deliver your emails.
Many people ask us how long it takes to send X emails per min/hour/etc.. There is no way to
give a definitive answer to this.
In theory we can send to a single list of a million subscribers in under an hour.
There are however some factors that can affect this:
Your list quality
Lists that have lower quality (low interactions, high bounces, high abuse, etc..) will
often be delayed/slower.
Your subscribers domain
Some ISPs may delay or require that we slow down and throttle when sending to
your list. So if a good majority of your subscribers are with such an ISP it could bring
down the speed.
Email delivery speed is not something our users worry about when using our hosted service.
As with a good list it is simply not an issue as the sending completes very quickly.