Added possibility to set SMTP port.

src/backend/mail.rs

@@ -107,6 +107,11 @@ cfg_if! { if #[cfg(feature = "ssr")] {
                     } else {
                         AsyncSmtpTransport::<Tokio1Executor>::relay(&self.server().clone().unwrap_or_default())
                     }.expect("Cannot create SMTP mail transport");
+                    let transport = if let Some(p) = self.port() {
+                        transport.port(p)
+                    } else {
+                        transport
+                    };
                     if self.user().is_some() && self.password().is_some() {
                         let cred = Credentials::new(self.user().clone().unwrap(), self.password().clone().unwrap());
                         transport.credentials(cred).build().send(msg.build_mail(self.from().to_string())?).await?;