Webhook for all events (add `accepted`, `rejected`)
"accepted" "rejected" events are not available in webhooks. Adding them to webhooks would help our system track all emails not just "delivered" or "bounced" in the same way as all the other events.
"delivered" or "failed" events already fires for every email so adding "accepted" wouldn't increase the system load that much but would greatly help systems that need it.

Hello,
Wanted to post an update that Mailgun now supports an Accepted event webhook. Further there is nothing on the roadmap regarding a rejected webhook. Feel free to repost this as a new feature request regarding need for a 'rejected' webhook.
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Kevin commented
+1. This is an unexpected gap in feature parity for event webhooks; would really be good to have it.