Discourse installs HTTPS as standard, so mail-receiver should probably reflect this too.
## This is simply your forum's base URL, with `/admin/email/handle_mail`
## appended. Be careful if you're running a subfolder setup -- in that case,
## the URL needs to have the subfolder included!
- DISCOURSE_MAIL_ENDPOINT: 'http://discourse.example.com/admin/email/handle_mail'
+ DISCOURSE_MAIL_ENDPOINT: 'https://discourse.example.com/admin/email/handle_mail'
## The master API key of your Discourse forum. You can get this from
## the "API" tab of your admin panel.