Correctly delete mails with aliases

src/main.rs

@@ -638,20 +638,29 @@ async fn delete_mail(
     User(user): User,
     Form(delete): Form<Mail>,
 ) -> Result<Redirect, Error> {
+    let mut tx = state.db.begin().await?;
+
+    sqlx::query!("DELETE FROM alias WHERE dest = $1", delete.mail)
+        .execute(&mut *tx)
+        .await?;
+
     let rows_affected = sqlx::query!(
         "DELETE FROM emails WHERE id = $1 AND mail = $2",
         user,
         delete.mail
     )
-    .execute(&state.db)
+    .execute(&mut *tx)
     .await?
     .rows_affected();
 
     if rows_affected != 1 {
+        tx.rollback().await?;
         tracing::warn!("Invalid number of rows affected in delete: {rows_affected}");
         return Err(Error::InternalError);
     }
 
+    tx.commit().await?;
+
     Ok(Redirect::to("/"))
 }