I did a quick search but only found someone saying it doesn’t work. But I’m not entirely sure what it’s used for in the first place. Can I get a short explanation?

It’s for bounce handling, when email fails to deliver, we want to disable the user’s email and/or notify them via PM that their email is busted. You’ll notice several common email services are represented in site settings, for the same reasons. In order to know that email failed to deliver, you nee…

More information available on the dedicated howto topic :wink: [image] Configure VERP to handle bouncing e-mails Self-Hosting Setting up bounces handling Discourse uses the Variable envelope return path (VERP) technique to handle bouncing e-mails. To enable V…

Mailgun api key, what is it for?

Support

zogstrip December 11, 2018, 6:35pm 3

More information available on the dedicated howto topic

Topic		Replies	Views
Mailgun api key check backward (no API key should be required if bounces handled by mail receiver) Bug	2	322	February 24, 2026
Configure VERP to handle bouncing e-mails Self-Hosting email , how-to	9	32085	March 18, 2026
Does Discourse use Mailgun's validations feature? Self-hosting	10	1489	January 16, 2019
Bounced emails not being detected Support email	16	1511	February 7, 2024
Zero entries in bounced email list Support	3	704	April 10, 2021

Mailgun api key, what is it for?

Related topics