If your emails are being sent out multiple times, there are several potential causes. Here is a list of steps you can take to troubleshoot the issue:

1. Check if your email settings are configured properly, like the email address used, SMTP authentication, etc.
2. Check your sent mail folder to see if the emails were sent more than once from your end.
3. Check with your email provider to see if the emails are routed more than once.
4. Review your email campaigns to determine if the same email is sent more than once.
5. Check if the email recipients have bounced more than once.
6. Make sure that automated systems like mail merge or personalization plugins are not sending out duplicate emails.