It seems just fine? As it's my secondary account it's mostly SMTP idle so I can't give an honest opinion about delivery (like emails from your bank) but it seem

It seems just fine? As it's my secondary account it's mostly SMTP idle so I can't give an honest opinion about delivery (like emails from your bank) but it seems to be doing very well as a service. Like Fastmail, they have a detailed domain setup wizard to ensure all your DNS for SPF/DKIM/dmarc etc. is all properly configured for best results. I have no complaints for what I use it for, really. I do wish that I had finer grained app password control like Fastmail but it's not a deal killer. I went with Fastmail as my primary due to the enhanced feature set and crazily enough - the Notes and Files feature in their mobile app. I can take a picture, toss it into that folder and get it on my desktop quicker than finding a USB cable or running a foldersync - the Notes are similar, I replaced Google Keep by just using the Fastmail Notes functionality.