| PASS | single_email doesn't have the multiple attribute | |
| PASS | value should be sanitized: strip line breaks | |
| PASS | Email address validity | |
| PASS | When the multiple attribute is removed, the user agent must run the value sanitization algorithm | |
| PASS | multiple_email has the multiple attribute | |
| PASS | run the value sanitization algorithm after setting a new value | |
| PASS | valid value is a set of valid email addresses separated by a single ',' | |
| PASS | When the multiple attribute is set, the user agent must run the value sanitization algorithm | |