For the Channel and Self-Service email configurations, is there a possibility to use one email adrs

[Abilash]

In our org we are planning the email option in channels and service of an project for raising ticket in jira ,

I have a couple of questions:

1.But when selecting request types, it's not showing all types—only limited request types are appearing.After that added description field also Only some request types are showing when I select the request type option. 

2.Is there any option to create just one email address that can support all request types based on the user's query? Creating a separate email for each request type doesn't seem practical. Is there a possibility to set this up?