Thanks Richard, unfortunately, we’re going to exceed the 500k Pageviews /month limit in the professional package, and we need Custom Plugins, so the lowest one that suits you is Business – being a non-for-profit, we cannot afford that.
Btw, do you get into an IP blacklists management nightmare because of the complimentary email sending you provide?
I ended up installing my own Mail-in-a-Box email in a $5/mo DigitalOcean droplet, and now can send infinite number of emails provided I comply with all regulations, SPAM-CAN etc. I’m not dependent on those mail services anymore, yahoo! And my spendings are limited to $5/mo. I can also add unlimited domains to my Mail-in-a-box instance.
UPD. Mail-in-a-Box is still serving me very well for multiple Discourse instances, as well as WordPress transactional email.
What I wanted to add as an update is that I’ve also been managing two Discourse instances for nonprofits, and for those I’m using SendGrid through Azure nonprofit credits, which is $3500/year, so basically free - more reliable and even cheaper than mail-in-a-box.
For another org I’m using Discourse for Project Management, and this is yet another case when going with mail-in-a-box is a safe solution since you don’t expect any ads or occasional spammy messages; therefore:
your mail-in-a-box IP won’t repeatedly get blacklisted