I didn't know Lemmy could run on arm architecture. Is your installation with docker?

Thanks! That list is much longer than I expected!

I'm not familiar with Nebula. Are known Youtubers on that platform?

Got the same issue. Everything was setup properly. SPF, dkim, dmarc was all good. Server IP wasn't in any blocklists. But my messages would still fall in spam with Gmail.

Ended up setting sendgrid as a relay and all is good now.

Kind of both. His server has a mirror of the community. When he comments it gets saved on his server and the his server communicates with the original server. In turn the original server also communicates his comment with other federated servers.

My god! Being based on chromium and developed by Microsoft were already 2 reasons to stay away. Why would they feel the need to send viewed images back to Microsoft?

I wonder if this includes private images from iCloud/google photos.