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"
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.
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.
Imported Document ID: TECH94727
Subscribing will provide email updates when this Article is updated. Login is required.