So far, the only time we (or the beta testers) have gotten crashes is when other Mail plugins are loaded or the Public Preview has expired.

We've been using it internally for a long time (at least 3 months) so we are pretty confident that DMI operates crash free.

Mail Plugins are located in Home -> Library -> Mail -> Bundles

Remove all plugins except DayLiteMailIntegration.mailbundle and restart Apple Mail (GPGMail is guaranteed conflict)

If you continue to experience crashes, then remove our plugin and restart Apple Mail

If you notice that your crashes occur because of our plugin, please email us asap!