Troubleshooting issues with request types

When JIRA Service Desk creates new requests from emails sent to the email account associated with your service desk, it copies the email subject to the Summary field and the email content to the Description field. When more fields are required, JIRA Service Desk cannot parse emails to fill them in with correct values. 

To resolve it:

You have the following options.

• If you want to show a hidden field, make it an optional one. 
• Ask your JIRA administrator to change the default request type for the email channel to use a different request type, and then modify your request type to include more required fields. You can also create a new request type for the email channel if no existing types are suitable. For more information about the email channel setup, see Setting up the email channel.