A mail exchange (MX) record identifies a server that handles email messages
for your domain. A domain has one or more MX records listed in priorty order.
When someone sends an email message to your domain, the sender’s mail server
delivers it to the first available server in the priority list. You create new
MX records, or change their priority, in order to change how email is processed
for the domain. (Learn more about MX records
and mail server priority.)

You create MX records using the administration tools available from your
domain provider.

There are two ways to create MX records for the Google Apps mail servers when
GoDaddy hosts your domain:

• Use GoDaddy’s configuration tool to automatically create the necessary
  Google Apps MX records. Log into the configuration tool at https://www.godaddy.com/gdshop/google/gmail_login.asp.
• Manually create the Google Apps MX records by following the steps
  below.

To manually create MX records for a domain hosted by GoDaddy:

1. Log in to your account at http://www.godaddy.com by clicking the My
   Account tab.
2. Under the Domains header, find the domain you’re using with
   Google Apps. Click (Advanced Details) to the right of this
   domain.
3. Under the DNS Manager header, click
   Launch.
4. In the MX (Mail Exchanger) section, click Quick
   Add.
5. Add an MX record for each mail server in the table below.
   

   Priority	Mail Server
   1	ASPMX.L.GOOGLE.COM.
   5	ALT1.ASPMX.L.GOOGLE.COM.
   5	ALT2.ASPMX.L.GOOGLE.COM.
   10	ASPMX2.GOOGLEMAIL.COM.
   10	ASPMX3.GOOGLEMAIL.COM.

   For each MX record, make sure to:

   • Enter the corresponding priority in the Priority field.
   • Enter an @ sign in the Host field.
   • Enter the fully qualified server name of the email server—such as
     ASPMX.L.GOOGLE.COM.—in the Points to field. Include a period at
     the end of the server name.
   • Select 1 Hour from the TTL drop-down list.
6. Delete any existing MX records, or lower their priority. For now, we
   recommend that you keep all existing MX records, but lower their priority.
   Later, once you have tested your service and confirmed mail flow, you can delete
   these records to ensure that mail flows through the new mail server(s).
7. Once you’ve added all 5 MX records in the table, click Save Zone
   File at the top or the bottom of the page.

Congratulations! Your new MX records now point to Google. Keep in mind that
changes to your DNS settings can take up to 24 hours to propagate through the
Internet, but depending on your host, this can happen faster.

If you have difficulty creating MX records, contact GoDaddy for
assistance.

http://www.google.com/support/a/bin/answer.py?answer=33353

If you have problems with WordPress and you get the error message WordPress Fatal error: Allowed memory size of ********* bytes exhausted then you have a few options.

1. If you have access to the PHP.ini file, change the line within the PHP.ini which controls the allocated memory 32M try 64M:
memory_limit = 128M ; Maximum amount of memory a script may consume (128MB)

2. If you do not have access to PHP.ini try adding to the .htaccess file:
php_value memory_limit 128M

3. Try adding this line to your wp-config.php file:
Increasing memory allocated to PHP
define(‘WP_MEMORY_LIMIT’, ‘128M’);

4. Talk to your hosting provider if you still have issues.