Email from APB is hit or miss across the board - this includes the Forgot Password emails as well.
This started for us since GDPR last year when we had to spam 9 years of players.
I have found that some providers direct our newsletters to spam because they have links to the site in them.
Others direct them to quarantine. I recommend going to webmail for your provider and seeing if you can find the quarantine folder and then whitelisting our email address.