use rfc 5322 email regex

backend/src/lib/domain/warren/models/user/mod.rs

@@ -86,8 +86,9 @@ pub enum UserEmailError {
     Empty,
 }
 
-static USER_EMAIL_REGEX: LazyLock<Regex> =
-    LazyLock::new(|| Regex::new(r"^[^@]+@[^@]+\.[^@]+$").expect("Email regex"));
+static USER_EMAIL_REGEX: LazyLock<Regex> = LazyLock::new(|| {
+    Regex::new(r#"^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$"#).expect("Email regex")
+});
 
 impl UserEmail {
     pub fn new(raw: &str) -> Result<Self, UserEmailError> {