Operating system
Windows
Joplin version
3.5.13
Sync target
OneDrive
What issue do you have?
The filename in an attachment contains a colon (e.g. A Night to Remember: The Classic Bestselling Accou - Notebook.html). This causes the plug in to fail and all emails following this one are not imported and the plug in disables itself,
Workaround is to delete the email from your Inbox and re-enable the plug-in.
IMHO the plug-in should just remove characters like colons which would cause filename issues with the OS (Windows in my case).