feat: improve SMTP logging

Author: link2xt

src/smtp.rs

@@ -552,7 +552,7 @@ pub(crate) async fn send_msg_to_smtp(
     }
     info!(
         context,
-        "Try number {} to send message {} over SMTP", retries, msg_id
+        "Try number {retries} to send message {msg_id} (entry {rowid}) over SMTP"
     );
 
     let recipients_list = recipients
@@ -576,7 +576,7 @@ pub(crate) async fn send_msg_to_smtp(
     {
         info!(
             context,
-            "Sending of message {} was cancelled by the user.", msg_id
+            "Sending of message {msg_id} (entry {rowid}) was cancelled by the user."
         );
         return Ok(());
     }
@@ -649,6 +649,8 @@ pub(crate) async fn send_smtp_messages(context: &Context, connection: &mut Smtp)
             },
         )
         .await?;
+
+    info!(context, "Selected rows from SMTP queue: {rowids:?}.");
     for rowid in rowids {
         send_msg_to_smtp(context, connection, rowid)
             .await

src/smtp/send.rs

@@ -64,9 +64,11 @@ impl Smtp {
             if let Some(ref mut transport) = self.transport {
                 transport.send(mail).await.map_err(Error::SmtpSend)?;
 
-                context.emit_event(EventType::SmtpMessageSent(format!(
-                    "Message len={message_len_bytes} was smtp-sent to {recipients_display}"
-                )));
+                let info_msg = format!(
+                    "Message len={message_len_bytes} was SMTP-sent to {recipients_display}"
+                );
+                info!(context, "{info_msg}.");
+                context.emit_event(EventType::SmtpMessageSent(info_msg));
                 self.last_success = Some(std::time::SystemTime::now());
             } else {
                 warn!(