Here are some steps to ensure emails are being sent correctly:

1. Check your mail client settings to ensure the sending order is correct.
2. Ensure you have the latest updates for both the mail client and the operating system.
3. Verify that any send/receive rules in your mail client is properly configured.
4. Check your Outbox to see if the messages are still there.
5. Run a virus check on your computer and other devices connected to your home network.
6. Verify your internet connection speed is sufficient for the task.