The list of domains that are currently bouncing our email is here. There is nothing that can be done about this. Apple and other ISP’s deem our email messages from Amazon Simple Email Services to be spam, despite Amazon having the highest possible ‘reputation’ (a mail technical term), which is why I use them.
comcast.net
t-online-de
Users with these domains will of course not get this email, unfortunately.
Again, I remind members that the web interface is the definitive and primary source, and always has all posts. Discourse is a web forum with a mailing list capability, not a mailing list with a web interface.