So I've been using mailhog to catch my development emails for a few years.

But noticed that some of the inline images weren't rendered in the mailhog GUI and the mailhog docker image hadn't been updated for a few years

So I've switched to Mailpit which seems to have a few more niceties and shows me a list of potential client problems with the format of emails.

https://hub.docker.com/r/axllent/mailpit