"Jack is like a magical techie multi-tool whose integral role in supporting our clients cannot be understated. Super skilled in all things hosting and email related, helpful, professional, proactive, responsive, he's never let us down. If I could 3D print a squad of Jacks, we'd take over the world. In case you hadn't already got the picture, hire him. He's amazing and you won't regret it."

"I hired Jack to help us with some DNS changes and was blown away by his comprehensive communication, systematic review, and the -results- of dramatically helping our email delivery. He's the only DNS expert we are planning on using going forward period. Thanks, Jack!"

"We hired Jack to help with deliverability for our large-scale cold email operation. We went in sending about half a million cold emails per day at close to a 12% bounce rate, which we weren't able to hone in and resolve on our own. With his technical expertise and understanding of the complexities of DNS setup, he helped us identify where we were bouncing, and in return consulted on how to reduce that %. We are now happily sending the same amount of email at <3% bounce rate. Jack has been readily available to answer questions and provide support throughout his contract with us, and beyond. I learned a lot from him and he made a lasting impact on our business. I can't thank him enough! "

"Cannot praise Jack enough! He has consistently demonstrated his exceptional skills and dedication across multiple projects with us. Jack consistently goes above and beyond to exceed our expectations. I wholeheartedly endorse his services and would highly recommend Jack to anyone in my personal or professional network - 10/10!"

"I'd been battling with a major email delivery issue between two of the top global software brands for weeks and found several forums mentioning Jack's solution. I contacted him and he responded over the weekend, lined up a call and walked me through his fix. We applied this and it immediately resolved our issue making our clients very happy. Would definitely recommend Jack, and his expertise."

"We hired Jack to help us with some email deliverability issues from Office365 domains that were unable to deliver to Google mail accounts when using IPv6. Jack was very quickly able to identify the route cause of the problem (Google incorrectly blacklisting Microsoft's IPv6 addresses) and deliver a solution (use a customer connector in Exchange Admin Center which forced Office365 to use IPv4 addresses). We've used Jack again since this issue and he has always been prompt with his responses, have a great in-depth technical understanding of email and email deliverability and we are glad we can call on him when we need to."