Sended email not showing in Sent folder of Sender

[moodstubos]

strange, the message is sent correctly via SMTP but does not end up in the sent folder. I have never seen such behavior before. Is that a problem with this library?

final smtpServer = SmtpServer(emailServer, username: emailUsername, password: emailPassword);

final message = Message()
      ..from = Address(from, 'Sender')
      ..recipients.add(Address(to, 'Recipient'))
      ..subject = subject
      ..text = composeEmail
      ..attachments = attachments;

try {
      final SendReport sendReport = await send(message, smtpServer);
      print('Message sent: ' + sendReport.toString());
    } on MailerException catch (e) {
      print('Message not sent. ${e.message}');
      for (var p in e.problems) {
        print('Problem: ${p.code}: ${p.msg}');
      }
    }

[close2]

SMTP is only the protocol for sending mails. Adding mails to a "sent mails" folder is done by other protocols (usually IMAP).

There is/was an attempt to merge SMTP and IMAP: JMAP. I don't know how successful this new protocol is.