Hosted Email Security (HES) does not send Non-Delivery Receipts (NDRs) for emails rejected by Active Directory Sync Client

- Updated:
- 15 Dec 2016
- Product/Version:
- Hosted Email Security 3.0
- Platform:
- Not Applicable N/A

Summary

HES/HES - Inbound Filtering denies emails for non-existent users and does not send NDRs for emails rejected using Active Directory Sync Client or Directory Management.

Details

During the SMTP connection between the sender’s mail server and HES mail server, HES/HES - Inbound Filtering sends an SMTP Error back to the sender’s mail server instead of an NDR. It is up to the sender’s mail server to send an NDR back to the sender.

Example of an SMTP error:

Apr 18 21:55:22 in01 postfix/smtpd[52897]: NOQUEUE: reject: RCPT from unknown[undisclosed IP Address]: 554 5.7.1 <undisclosed recipient email address>: Recipient address rejected: Access denied; from=< undisclosed sender’s email address > to=< undisclosed recipient email address > proto=SMTP helo=<p1186-ipbf206oxxxx.xxxxx.domain.com >

Rating:

Category:

Configure

Solution Id:

1037272

Feedback

Did this article help you?

Thank you for your feedback!

What was the problem with this article?

The image(s) in the article did not display properly.

The article did not provide detailed procedure.

The article is hard to understand and follow.

The video did not play properly.

The article did not resolve my issue.

Others. Please specify.

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

Thanks for voting.

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.