Sign In with your
Trend Micro Account
Need Help?
Need More Help?

Create a technical support case if you need further support.

Mail is rejected with a Non-Delivery Receipt (NDR) message "Too many hops" in Hosted Email Security (HES)

    • Updated:
    • 16 Jun 2014
    • Product/Version:
    • Hosted Email Security - Inbound Filtering 1.9.8
    • Hosted Email Security 1.9.8
    • Hosted Email Security 2.0
    • Platform:
    • N/A N/A
Summary
HES rejected an email and you receive a Non-Delivery Receipt (NDR) with the reason "Too many hops".
Details
Public
The message "Too many hops" means that the email went through to several mail servers before it went to the last one that rejected it. This means either you set the hops threshold too low or the email was on loop.
For example, if a user has two accounts, forwarding to each other, which results to an endless loop. A message sent to User1 account is forwarded to another mailbox; if that mailbox account is set to forward to User1, then a mail loop is created: mail goes from User1 to the mailbox back to User1 back to the mailbox, etc., until the loop is ascertained and the message returned to its sender.
To resolve the issue, check the NDR headers and content to assess if the email met the hops threshold or it went on a loop. HES and most of the Mail Transfer Agents (MTAs) have a default value of 50 hops threshold.
Premium
Internal
Rating:
Category:
Troubleshoot
Solution Id:
1103824
Feedback
Did this article help you?

Thank you for your feedback!

To help us improve the quality of this article, please leave your email here so we can clarify further your feedback, if neccessary:
We will not send you spam or share your email address.

*This form is automated system. General questions, technical, sales, and product-related issues submitted through this form will not be answered.

If you need additional help, you may try to contact the support team. Contact Support


To help us improve the quality of this article, please leave your email here so we can clarify further your feedback, if neccessary:
We will not send you spam or share your email address.

*This form is automated system. General questions, technical, sales, and product-related issues submitted through this form will not be answered.


Need More Help?

Create a technical support case if you need further support.