license and some functions

src/config/smtp.rs

@@ -1,3 +1,12 @@
+/*
+ * Copyright (C) 2026 Mateusz Gruszczyński @linuxiarz.pl
+ * Source-Available Code / Dual-Licensed.
+ *
+ * Free for non-commercial and evaluation use under terms of BSL/GPLv3.
+ * Commercial or production use requires a valid paid license.
+ * See LICENSE file in repository root for details.
+ */
+
 use lettre::message::Mailbox;
 
 use crate::state::{SmtpConfig, SmtpSecurity};
@@ -84,7 +93,10 @@ mod tests {
     #[test]
     fn accepts_supported_security_modes() {
         assert_eq!(parse_smtp_security("none").unwrap(), SmtpSecurity::None);
-        assert_eq!(parse_smtp_security("starttls").unwrap(), SmtpSecurity::StartTls);
+        assert_eq!(
+            parse_smtp_security("starttls").unwrap(),
+            SmtpSecurity::StartTls
+        );
         assert_eq!(parse_smtp_security("tls").unwrap(), SmtpSecurity::Tls);
         assert!(parse_smtp_security("auto").is_err());
     }