Message Security Administration Guide >  Domains > Changing MX Records for a Domain

Changing MX Records for a Domain

WARNING: Never route DNS MX entries to the message security service before adding the domain. All such traffic will be immediately bounced with the SMTP fatal error: 554 No relaying allowed - psmtp.

Here are step-by-step instructions to look up the correct DNS configurations to make the message security service the preferred MX record for the domain:

1.	Go to Orgs & Users > Orgs and select any organization.

2.	Click DNS Instructions in the Organization Settings section.

3.	For each domain, configure the DNS MX records as described in the Administration Console.

WARNING: If you use the incorrect MX record configuration your mail traffic will bounce. There are two possible MX record configurations.

If you want your DNS MX records pointing directly to a local mail server, they should have a DNS MX priority number greater than 400 to insure that the message security service mail servers are used first in normal mail flow.