What should I do when I receive bounce messages for the emails I did not send?

What should I do when I receive bounce messages for the emails I did not send?

  1. Check your sent folder for unauthorized emails. If you find any, and in case you are sure that you did not send it, there might be a chance that your account is compromised.
  2. In case you suspect your account is compromised,
    1. Change your account password immediately.
    2. Check User Activity log.
    3. Log out from all existing devices.
    4. Contact our support for further assistance.
  3. If you did not find any unauthorized emails, then the bounce emails you received will be a result of return-path spoofing. To avoid this,
    1. Set up a strict SPF record or request your admin.

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