Solved How to add an email from backend if not match with email pattern?
How to add an email from the backend if not match with email pattern?
As there is a front end validation which actually check a valid email (like .com/.net/.in at the end) so it will not allow you to add from front end.
Now you can do one thing add any email from front end and change the email from backend files.
Open swiftmailer.yaml, uvdesk.yaml, uvdesk_mailboxes.yaml file under config->packages of your project.
You can change the email from these files after adding any valid email from front end.