- US Mailgunhttps://api.mailgun.net/v1/alerts/settings/webhooks/signing_key
- EU Mailgunhttps://api.eu.mailgun.net/v1/alerts/settings/webhooks/signing_key
curl -i -X PUT \
-u '<username>:<password>' \
https://api.mailgun.net/v1/alerts/settings/webhooks/signing_keyResponse
{ "signing_key": "string" }