“Error: too many connections” message appears when sending a large amount of emails in Hosted Email Security (HES)

- Updated:
- 25 Jan 2017
- Product/Version:
- Hosted Email Security 3.0
- Platform:
- Not Applicable N/A

Summary

When you send a large amount of outgoing emails, the HES relay server rejects them and you get the following error message:

421 4.7.0 in08.sjc.mx.trendmicro.com Error: too many connections from216.24.228.26

Details

The issue occurs because your outgoing MTA opening has more than four (4) concurrent connections. The limit set in each inbound MTA is 4 concurrent connections for each client.

To resolve the issue, configure your outgoing MTA to open not more than 4 concurrent connections.

Rating:

Category:

Configure; Troubleshoot

Solution Id:

1038586

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.