@julian can't be the API as I have checked it multiple times.
I have heard that MailGun got to be on the same IP/localhost as NodeBB/Computer (in my case VPS), is that true?
Verification emails not getting sent and some emails ending in spam
Any idea how to fix this issue? I have a fresh install of the nodebb forum and as title says, verification don't get sent and if some do, they end up in spam
Using an emailer plugin is the suggested way of solving this https://github.com/julianlam/nodebb-plugin-emailer-sendgrid