When I see "3 / 6.5K suppressed" on the dashboard it looks like I had 6.5K emails suppressed. I know only 3 were suppressed but my eye just catches the "6.5K suppressed". How about displaying the information at the top of the screen like this:

5.4K delivered / 5.5K sent, 10 failed / 5.5K sent, 3 suppressed / 5.5K sent

The new Statistics dashboard shows a lot of promise, but needs more filter options to be genuinely useful.

Could we see filtering by tag type for example? Domain as the only filter type is not helpful as we can already find those stats elsewhere.

We manage hundreds of custom domains for our customers. They each can have their own domain. However, we are sending similar content or there are commonalities across the different domains. We would like to control some settings across domains such as safelists, suppressions, and webhooks.

Mailgun supports now DKIM 2048 that is told to be better for avoiding spammers .
All previously added domains has DKIM 1024.
I propose a feature allowing to switch DKIM 1024 to 2048 keeping all other settings (without requiring to remove domain with all its settings and then to re-add).

Add the ability to add a picture by your name -- little box that shows up in Gmail with the image of the sender

One thing that would be nice: being able to see aggregated statistics in your dashboard. It would be useful to see errors/warnings for all domains, and also seeing the total number of send/received mails.