docs: clarify documentation

src/settings.rs

@@ -163,8 +163,9 @@ impl EmailSettings {
     ///
     /// # Errors
     ///
-    /// Returns a `ContactError` if the email address in the `from` field cannot be parsed
+    /// Returns a `ContactError` if the email address in the `from`
-    /// into a valid mailbox. This can occur if:
+    /// field of `recipient` cannot be parsed into a valid mailbox.
+    /// This can occur if:
     /// - The email address format is invalid
     /// - The email address contains invalid characters
     /// - The email address structure is malformed