We just sent out our first bulk email through Civi 4.7.15 and WordPress 4.7.2 ... went off without a hitch, but in a matter of hours I received a nastygram from our hosting provider. Seems the terms of service prohibit sending more than 250 messages at once -- who knew?
To comply with the provider's TOS, we need to implement rate limiting. In other words, whenever we send a bulk email, the system needs to trickle the messages out at, say, 15 every 5 minutes (not all at once).
What rate limiting methods are available within CiviCRM to minimize the negative impacts on shared hosting servers when sending bulk email?