DigitalOcean Restricts SMTP

I've attempted to set up my own email server for personal use multiple times. Even with fulfilling the tablestakes of SPF, DKIM, and DMARC etc, I always run into at least one major email provider blocking all emails from me specifically because of who I host my VPS with. Outlook in particular seems to aggressively block all SMTP communication with both DigitalOcean and Linode. As an individual, there's nothing I can do about this.

I've just resigned myself to either not being able to not communicate with email addresses on Outlook, or use an alternative email address for those rare occasions.

I see:

> As a part of this new policy, we have launched partnerships within the DigitalOcean Marketplace for routing mail from DigitalOcean Infrastructure. Our partners have a dedicated focus on email delivery so as a DigitalOcean customer you can be assured that your emails will be delivered.

But it's not clear to me if that means there will certain marketplace applications that will be "blessed" to send mail or if I'm just misinterpreting that line.