fix: use different mail port

Hetzner likely blocks the default SMTP port.

src/modules/sendMail.ts

@@ -20,8 +20,8 @@ export const sendMail = async(subject: string, body: string): Promise<void> => {
       user: "noreply@nhcarrigan.com",
     },
     host:   "mail.nhcarrigan.com",
-    port:   465,
-    secure: true,
+    port:   587,            // UPDATED: Standard port for STARTTLS
+    secure: false,          // UPDATED: false means "Connect then upgrade via STARTTLS"
   };
   const defaults: SMTPTransport["options"] = {
     from: "noreply@nhcarrigan.com",
@@ -33,4 +33,4 @@ export const sendMail = async(subject: string, body: string): Promise<void> => {
     subject: subject,
     text:    body,
   });
-};
+};