Is Mac Mail crashing the moment it opens?

Greetings JuliaRingma,

We see that you're having a problem with Mail on your Mac, and we'd like to see how we can help with this.

If you're seeing that this is only occurring with Mail on your Mac and not other applications, it may be best to check for an update to macOS. In addition to this, we'd recommend checking out the steps of the following resource to see if any of these help to clear up what is occurring.

If an app freezes or quits unexpectedly on Mac

If you see that this doesn't help with what you're experiencing, could you let us know if you've made any changes recently to your Macs?

We look forward to hearing back from you.

Cheers!

You most likely have received a malformed email. Try removing it by using the webmail service of your mail provider.