Since eNewsLetter appears to be falling to the wayside… I'd like to suggest two options for consideration.
1) PHPList Support
– It'd be so painless on our end if we could integrate the self hosted option into Hustle. I also say PHPList, because their self-hosted, open-source option is SO PAINLESS to setup and get started with.
— Mautic appears to have a ton more bells-n-whistles than most Self Hosted options, but the setup isn't all too straight forward for most folks. (or, at least wasn't when I last gave it a whirl)
2) Kill off eNewsLetter (as a standalone plugin) and integrate that into Hustle! …that'd seem like a win-win, IMO :wink: