KB Article # 11171
Topic/Category: Email Import
Ephesoft Version: Up to 184.108.40.206
Issue: Special Characters Not Allowed for Username Email Setup
Regex Webui validation for username does not allow special characters such as & or even email address in some versions. Future version of ephesoft will remove validation check.
Type in a username without the special characters to allow save. As a workaround go into database table batch_class_email_configuration and edit the username manually.