Added setting for SMTP hello command.

src/backend/mail.rs

@@ -17,6 +17,7 @@ cfg_if! { if #[cfg(feature = "ssr")] {
     use lettre::{AsyncSmtpTransport, AsyncFileTransport, AsyncTransport, Tokio1Executor};
     use lettre::transport::smtp::client::{Tls, TlsParameters};
     use lettre::transport::smtp::authentication::Credentials;
+    use lettre::transport::smtp::extension::ClientId;
     use std::ops::Add;
 
     pub async fn message_for_type(msg_type: &MessageType, pool: &PgPool) -> Result<Message, Error> {
@@ -137,6 +138,11 @@ cfg_if! { if #[cfg(feature = "ssr")] {
                     } else {
                         transport
                     };
+                    let transport = if let Some(hello) = self.hello_name() {
+                        transport.hello_name(ClientId::Domain(hello.to_string()))
+                    } 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?;

src/config.rs

@@ -65,6 +65,7 @@ pub struct Mailing {
     from: String,
     path: Option<String>,
     server: Option<String>,
+    hello_name: Option<String>,
     port: Option<u16>,
     user: Option<String>,
     password: Option<String>,
@@ -86,6 +87,9 @@ impl Mailing {
     pub fn server(&self) -> &Option<String> {
         &self.server
     }
+    pub fn hello_name(&self) -> &Option<String> {
+        &self.hello_name
+    }
     pub fn port(&self) -> Option<u16> {
         self.port
     }