Unable to change email address to company domain even when "company.security.strangers" is false

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, 7.2.X, Master
• Fix Version/s: 7.1.10 DXP FP19, 7.1.10.5 SP5, 7.1.X, 7.2.10 DXP FP7, 7.2.X, 7.3.4 CE GA5, 7.3.10 DXP GA1, Master
• Component/s: User Management > Users & Organizations
• Labels:
  • backend_test
  • ee-ts
  • liferay-dxp-71-sp5
  • liferay-fixpack-dxp-19-7110
  • liferay-fixpack-dxp-7-7210
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/drewbrokke/liferay-portal/pull/1118

Steps to Reproduce

1. Add the following properties:

company.security.strangers.with.mx=false
company.security.strangers=false

2. Go to Account Settings (Profile Picture > Account Settings)
3. Change email address to [e-mail]
4. Press Save
5. Try to change it back to [e-mail]

Expected Results
The email address is modified successfully.

Actual Results
The email address is not modified and the error "The email address you requested is not valid because its domain is reserved." appears.