I read that forum rant and the linked content, and there is still no evidence that Gmail is deleting emails immediately by default. I read two possible causes:
- Content Compliance setting (managed by admin) that can prevent emails from reaching inbox
- Some other service, such as Exchange, which can somehow interfere with Gmail?
Specifically, the article mentions a "quarantine" folder that is not part of Gmail. Or am I missing something?
The quarantine folder you mention is part of the content compliance settings. Mail that matches content compliance rules goes into a quarantine that only admins can access.
