The absolute worst with hosting your own email lists / transactional emails is that you need to be very up to date on the status of your IPs and domains in various blocklists, and it's very easy to get blocked from them.

I don't see anything mentioned about this, nor other similar issues, either on the website or in the GitHub repository.

Are you offering some functionality that help people manage this, or how do you suggest people approach this "when not if" problem?

Looks like they currently support sending emails through SendGrid https://docs.dittofeed.com/integrations/channels/sendgrid

Sendgrid's deliverability and reliability is starting to tank. Looking to get off Sendgrid myself.

What alternatives are you looking at?