threads

smtp/session.go

@@ -73,7 +73,19 @@ func (s *session) Data(r io.Reader) error {
 	files := make([]*utils.File, 0, len(attachments)+len(inlines))
 	files = append(files, attachments...)
 	files = append(files, inlines...)
-	return s.client.Send(s.ctx, s.from, s.to, eml.GetHeader("Subject"), eml.Text, eml.HTML, files)
+
+	email := &utils.Email{
+		MessageID: eml.GetHeader("Message-Id"),
+		InReplyTo: eml.GetHeader("In-Reply-To"),
+		Subject:   eml.GetHeader("Subject"),
+		From:      s.from,
+		To:        s.to,
+		Text:      eml.Text,
+		HTML:      eml.HTML,
+		Files:     files,
+	}
+
+	return s.client.Send(s.ctx, email)
 }
 
 func (s *session) Reset() {}