PowerMTA™ from Port25 Solutions, Inc., is the Industry's leading email gateway application (SMTP server) that makes it easy for senders to adopt the latest authentication specifications ( SPF and DKIM) to comply with changing ISP policies for accountable outbound email delivery. No false promises. No over hype. It just delivers. Port25 was formed in 1999 by email infrastructure veterans to address the specific needs of email marketers. It was clear then – and now more than ever – that specialized email infrastructure solutions are required to address current unique and evolving trends. It’s the proven choice among cloud -based enterprises as well. The specialized multi-threaded architecture that we developed to meet these needs continues to deliver significant throughput advantages and has provided an ideal platform for advanced control, delivery intelligence, and, tracking features essential to senders in today’s environment.