Well... y'all uttered thusly:
@1castro said in Mailjet Plugin and nodeBB v1.16:
[....]
And yes, Mailjet has a free plan. (6,000 emails per month / 200 emails per day).
So I thought relevant, no?
@julian said in Mailjet Plugin and nodeBB v1.16:
@gotwf one wonders what the actual overhead is of sending email... Especially if you don't allow attachments (in free plans, for example)... It seems fairly minimal in theory...
Not so much for sending. Well, w/the caveat that, DKIM ups the ante a fair bit - wh/is one of several reasons I am not a fan. And yeah, I grok that it does help on the mitigation front. I just don't cotton to centralizing one of the greatest federated systems ever designed.
Incoming, otoh, takes some doing lest you want buttloads of spam and other malicious crap. Server side spam filtering and anti-virus scanning require a fair bit more horsepower. Not to mention the demand/expectation for webmail UI's that are too often too easy to crack.
But yeah, strip it all down to bare bones, circa the nineties, and it's is not so bad... 
P.S.; I am, of course, for the sake of discussion, not including the true cost of such: Sysadmin manpower and time.