I have been using mailcow as our small email solution for a few months now, and I have a small server with 16gb just for this purpose, but as of a month ago I have been seeing allot of slowdowns and would love some of the optional dns settings get a green check mark as well that I do not have the technical knowledge to get done. I would love some assistance with this as everything else on the server had been running smooth up until now. Emails now take 2 to 4 hours to go through to the server, and I do not know why