Below are the key points for this guideline:
- Outbound spam messages are not acceptable.
- Trend Micro Email Security is a cloud service shared by all subscribed customers within the same geographical region.
- Outbound messages are subject to spam policy checking using the same method applied to inbound messages.
- Customers sending outbound spam messages may lead to the blocking of the service IP addresses by 3rd-party Real-time Block Lists, which can affect not only the offending senders but also other customers in the same region.
- Trend Micro reserves the right to quarantine outbound messages identified as spam automatically.
- Recommended actions for outbound spam senders:
- Email administrators can go to Trend Micro Email Security Dashboard > Managed Domain > Outgoing > Top Statistics > Top Spam Senders to identify the top offenders over the past Day/Week/Month and implement preventive measures to reduce outbound spam volumes.
- In instances where it is suspected that spam messages were not sent intentionally, it is possible that the associated account may have been compromised. In such cases, please change the account password immediately.
- If it is determined that the sender intentionally sends those outbound spam messages, it is best to advise the user to stop such actions.
- For legitimate bulk marketing messages, it is recommended to reroute them through alternative channels, bypassing Trend Micro Email Security.
- Steps to take when an end user's outbound messages are auto-quarantined by Trend Micro:
- Email administrators can review the quarantined messages, filtering them by sender address to provide evidence of spamming to end users.
- In the unlikely event that some messages are misclassified as spam, the email administrator can contact Trend Micro Technical Support for assistance and make corrections.