That's perhaps because you have been self-hosting that long. One of the advises given to new self-hosters these days is to start sending mail to your your frien

That's perhaps because you have been self-hosting that long. One of the advises given to new self-hosters these days is to start sending mail to your your friends' email accounts that are hosted by the bigtech. Then you have to contact each one and ask them to mark it as not-spam, so that some day your mails will go to their inboxes, rather than the spam folder. Honestly, I don't think that DKIM/DMARC has made the situation any better. In fact, spamassassin and rspamd often seems to work better than their spam filters in identifying actual spam.