@email.majorpayne - it looks like you get in an indefinite loop of threat detection of malicious email. We hope that we’ve fixed in new product update - https://forum.avast.com/index.php?topic=210570.0 You can reinstall to fix immediately, or wait for automatic update.
Why it’s happening? There is an email with malicious content/attachment, it gets downloaded by your mail client however the Avast’s shields caught it. And “delete” locally. But then the mail client synchronises emails downloaded locally and emails on server. And it gets downloaded again.
