Incoming Email handler does not check user is inactive when mapping incoming email

Issue Summary

Many users have the same email address. The first user is inactive and does not have application access. Incoming email handler (Jira software) does not check the user is inactive and triggers the error below when trying to create a ticket from this email.

"Cannot create issue due to invalid license: [Sorry, you can't create any issues right now, as you need to have access to a Jira application to be able to create issues. To gain application access you need to be a member of a group assigned to an application."

Steps to Reproduce

1. Step 1
   Create users as shown below. See the first one is inactive and does not have application access.
   
2. Step 2
   Send an email from user's email address to Incoming mail handler mailbox.

Expected Results

User is inactive so mail handler should not check if user has application access or not. A ticket should be created.

Actual Results

Incoming mail handler check the inactive user that has no application access

Workaround

Remove email address from the inactive user so incoming mail handler does not map and check that user account.

Not on resolution

The problem is not a Jira bug, see related KBs covering the problem:

• https://confluence.atlassian.com/display/JIRAKB/Mail+handler+fails+to+create+issue+from+certain+email+addresses+in+Jira+server
• https://confluence.atlassian.com/jirakb/jira-incoming-mail-handler-processes-the-email-using-an-incorrect-user-968684632.html