Below is the current rule of supported and forbidden characters which be used in an email address when registering for an acccount at Private Post:
An email address is divided into two parts: local and domain. In the email address email@example.com, the local part is "aaa" and the domain is "test.com".
For the Local part of an email address, the forbidden characters are " ( ) : ; < > @ [ ] \ &
For the Domain part, the supported characters are:
- Uppercase and lowercase Latin letters A to Z and a to z
- The digits 0 to 9
- Special characters - and _