Is there a way to limit email request to come from a specific domain?

[Jervis Padua]

Is there a way to limit email request to come from a specific domain in JIRA SD?

[Sam Zhong]

I have similar question:

I have multiple projects, and I want to using one email address like "support@xxxx.atlassian.net", for the customers in each project is pre-added, the email suffixes is different, JIRA Service Desk will create the ticket based on the email suffixes to each project.

Any idea about this?

Thank you 

Sam