Incoming Email Not wokring, but the emails had been deleted.

Hi zhangwei8607​,

A lot of email issues can be found within the incoming and outgoing E-Mail History, I would recommend reviewing this first.

Usually the issue is caused when an email doesn't match a user in the system, you should check your configuration settings to determine whether any of the settings are preventing the ticket from being generated.

-Midnight

As there is a default an incoming mail configuration and I added another one which caused the issue for not creating ticket automatically.

After I use the default incoming mail configuration, it worked.

Thanks very much for your reply, the issue is that I created another configuration instead of using the default one.