fix(encryptid): allow self-signed TLS for internal SMTP

Mailcow at mail.rmail.online uses a self-signed certificate.
Set tls.rejectUnauthorized: false for the SMTP transport.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/encryptid/server.ts

@@ -126,6 +126,9 @@ if (CONFIG.smtp.pass) {
       user: CONFIG.smtp.user,
       pass: CONFIG.smtp.pass,
     },
+    tls: {
+      rejectUnauthorized: false,  // Internal Mailcow uses self-signed cert
+    },
   });
 
   // Verify connection on startup