A message in the Outbox has not finished sending. Avoid repeatedly pressing Send, which can produce duplicate messages.
- Check your internet connection and make sure your email app is not in offline mode.
- Save the message as a draft. Try a short message without attachments to check whether the problem affects all messages.
- Check the outgoing server, encryption and SMTP authentication against your secure email settings. Use your full email address and mailbox password.
- Try sending a short message through webmail. If webmail works but your app fails, record the app error before changing settings.
- Check the mailbox storage in cPanel, Email Accounts. If it is full, back up messages before removing anything.
Keep antivirus and certificate checks enabled. Do not remove and recreate the email account as a first step, as locally stored messages may be lost.
If it still fails, please send support the exact error and the time of one failed attempt through the client area, without your password.
