To search for a special character in an eMail address:
In the navigation menu choose one of:
Applicants
Clients
Contacts
Persons
Make sure the filter option is set to All
Click the Table
option
Click the Configure Columns gear ⚙
Add the Primary Email as one of the selected fields
Click the Filter icon for the eMail column
Choose Contains
Type ";" in the next field (without the quotes
Click Go
A list of matching records will be displayed