SMTP "450 Client host rejected: Try again later"

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Article ID: 177740

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Updated On:

Products

Messaging Gateway

Issue/Introduction

The Brightmail Gateway appliance responds to a mail server's attempt to connect with the message "450 Client host rejected: Try again later"

Symptoms
Mail is rejected with the message "450 Client host rejected: Try again later"

 

Cause

A response from the Brightmail Gateway appliance of "450 Client host rejected: Try again later" indicates the appliance has deferred the SMTP connection. The Brightmail Gateway appliance will defer an SMTP connection when there is a policy set for this action.

Resolution

Check for policies that use the action of "Defer SMTP Connection" By default the Email Virus Attacks group in the Bad Senders group under Protocols is set to use this action.