Troubleshooting mx records, I don't understand mx records, I don't know who my domain registrar is – Google Activation Guide Postini Email Security User Manual
Page 35: Will i lose mail after changing mx records, I typed the wrong information into the mx record, How can i tell if the mx update worked
Change Your MX Records
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Troubleshooting MX Records
I don't understand MX records.
For more information about MX records and how to use them, see “FAQ: How MX
Records Work” on page 49.
I don't know who my domain registrar is.
To find your domain registrar, follow these steps:
1. Search for "WHOIS server" on Google.com.
2. Select a search result from the list.
3. Type your domain name in to the field.
4. Click Submit.
Note:
Domain registrars are also referred to as DNS providers, domain
providers, or domain hosts.
Will I lose mail after changing MX records?
No. As long as you enter the MX records correctly, you won't lose any mail after
changing the MX records. While your MX records are changing over, some mail
will be delivered using your old MX information, and some mail will be delivered
using your new MX information, but all of it will be delivered.
I typed the wrong information into the MX record.
If you type the incorrect delivery information in the MX record, some mail will
bounce. The sender will receive notice that the mail wasn't delivered. Correct the
MX records as soon as possible. Some mail may still bounce for a period of time
(up to the length of the new TTL setting), but the sooner you update the MX
records to the correct setting, the fewer messages will bounce.
I updated my MX records correctly, but the changes aren't showing up.
This is normal. MX record updates are not immediate. After you've updated your
MX records, it will take a while for every sender to use the new MX records. Your
original TTL setting determines how long (in seconds) this will take. There is no
way to speed this up; changing the TTL setting won't affect this.
How can I tell if the MX update worked?
Send a test message from an outside address, then view the full headers. The full
headers are about 20-50 lines of text. If the headers include the word "psmtp.com"
then the mail flowed through the security service. Keep in mind that it can
sometimes take a few days for MX records to completely change.