[xyst]

Besides getting sent to spam, I haven’t had deliverability issues to gmail. All I needed to do was setup my DKIM, SPF, DMARC records correctly. Confirmed with mail-tester.com

I think linode may have had problems in the past with their assigned ip ranges being used as spam. Quickly looking into it, seems like they block outgoing email traffic by default now. But individual server owners need to manage IP rep.

[alan-hn]

I did all the same things and even registered my domain with google and added their verification DNS txt record. You're probably right about it being linode's IP range, although I did get permission from linode to use it as a mail server, they opened the right ports and I did get deliverability to other mail hosts just not google or my university at the time, annoyingly enough