Google Activation Guide Postini Email Security - Manual (Page 19)

Change Your MX Records 23
• Enter each of the MX records (as highlighted in the example above) in the
Address column. Be sure to enter your actual domain name for
yourdomain.com. Be sure to include the trailing dot as shown in this example,
and assign priority values of 1, 2, 3, and 4:
• If your domain registrar allows this, we recommend that you keep your current
MX records (examples shown in bold below) as a precaution for 48 to 72
hours, or until you have verified mail flow through the message security
service. However, be sure to assign the MX records shown in your activation
email with the higher priority values (lower numbers).
For example, the values of 1, 2, 3, and 4 represent higher priorities than the
values of 10 and 20.
yourdomain.com. IN MX 1 s7a1.psmtp.com
yourdomain.com. IN MX 2 s7a2.psmtp.com
yourdomain.com. IN MX 3 s7b1.psmtp.com
yourdomain.com. IN MX 4 s7b2.psmtp.com
yourdomain.com. IN MX 10 yourmailhost1.yourdomain.com
yourdomain.com. IN MX 20 yourmailhost2.yourdomain.com
• Once you are sure that mail flow through the message security service has
been established, we highly recommend that you remove your old MX records
to ensure your email traffic does not bypass the message security service and
connect directly to your mail server. (You verify your MX records later in the
activation process. See “Test Your MX Records” on page 41 and “Test Filtered
Mail Flow” on page 45.)
When you are finished switching your MX records to the message security
service, go to “Test Your MX Records” on page 41.
DreamHost
The following steps use example MX records. Be sure to enter the exact MX
records shown in your activation email.
To modify your MX records with DreamHost, do the following:
1. Log in to your account at www.dreamhost.com.
2. Click Mail on the left side and select MX from the drop-down menu.
3. Click Edit next to the domain you will be using.
Host name Address Pref
@ yourdomain.com.s7a1.psmtp.com. 1
@ yourdomain.com.s7a2.psmtp.com. 2
@ yourdomain.com.s7b1.psmtp.com. 3
@ yourdomain.com.s7b2.psmtp.com. 4