Multiple SMTP/ MTA is a performance addon for Interspire email marketer (IEM) that significantly increases IEM’s mail delivering competency. An email campaign can be sent over multiple concurrent connections ensuing a lot higher sending speed. Maximum number of emails can also be specified to send from each MTA. The deliverability could be enhanced upto 10 times more than what a default IEM installation can deliver with the appropriate hardware & suitable configuration. This feature can attribute in accelerating performance and balancing the load for your definite environment.