Email Configuration Problems

Usually problems with receiving email in your GApps account is due to a problem with the MX records on your domain host or registrar. GApps has a very good Help page for setting up your MX records.
https://www.google.com/support/a/bin/answer.py?answer=33352&query=mx&topic=&type=

It is important to enter the MX records as defined by Google. The period at the end of a server name is absolutely necessary. It's recommended that you copy and paste the server names from this Help page.

With some domain hosts, e.g. Yahoo, you leave the period off the server names used in the MX records. Yahoo will fill it in for you. If you add the period, Yahoo will remove it.

If you are not receiving email from some people, it's possible that there ISP has been black listed. One tool for checking is available from MXToolBox. You will need to know the domain name of the senders email address.
http://www.mxtoolbox.com/

If you've set up your MX records, checked the sender's domain name and can't get email to work, there is some detailed information you can publish onto the GApps forum:
http://groups.google.com/group/apps-discuss

What is useful to see is the detailed email server routing summary. It varies as to where you will find this. Within a GApps email account, open an email message that bounced from another GApps email account. Next to the Date and Reply button in the upper right section of the reading window, you will see a drop down list. Click on Show Original. Now you can copy and paste this information into a post for the GApps forum. There is some equivalent in other desktop email clients such as Outlook. Sometimes you right click on a message and look for Message Options. The routing information is list in a window pane called Internet headers.

Finally, there is information that can help to debug an email problem. Ask these questions:

• What is your domain name?
• Can you send or receive emails?
• Where are you reading your email? In a desktop client, e.g. Outlook. Using webmail in a browser to login into your GApps email account.
  
• Are you using pop or IMAP?
  
• Every message is affected or just some? Identify any special email addresses of a sender who can't get email to you.
  

Verification Issues

There are three ways to verify domain ownership. See the GApps Help page on verification http://www.google.com/support/a/bin/answer.py?answer=45694&topic=9196

You'll know verification is complete when the word Active is visible next to various applications on the Dashboard, e.g. Calendar.

If you are missing the "Verify Account" button at the top of the Control Panel or you need your special names for verification, try using this URL. Replace mydomain.com with your domain name.
https://www.google.com/a/cpanel/mydomain.com/VerifyOwnership.

If html verification used, use the URL http://mydomain.com/googlehostedservice.html to check if you can see the string.

Someone has broken into my email account

This may be helpful for compromised GApps email accounts but it says gmail accounts so I'm not sure.

In it appears that someone has broken into your gmail account, this form will help you to get in touch with the Google email support team for compromised accounts.
https://services.google.com/inquiry/gmail_security1

You may submit the form more than one time as you research the requested information.

Within the form, you will be asked for your IP address. Here is one web site that will give you your current IP address:
http://www.whatismyip.com/

Please note that the address may change from time to time unless you have a static address.

Setting up MX Records

 The following help page will show you how to set your MX records.  Section 4 allows you to check that the changes were propagated to external servers okay. It can take up to 48 hours for all servers world-wide to be updated. http://www.google.com/support/a/bin/answer.py?hl=en&answer=33352

Forwarding domain.com to www.domain.com

If you have a GoDaddy account that you purchased independently of signing up for GApps, you may follow these instructions by RDizzle. In these instructions, you will be shown how to create a CNAME of www that points to ghs.google.com and you will be shown how to forward the domain. The GoDaddy parked nameservers must be used for a forward.
http://www.compender.com/2007/12/setting-up-google-apps-web-pages-for.html

Can't recycle user account 5 days after deletion

To check if there is a problem in removing the account, login as admin and go the the User accounts tab then click on the Users Tab. Now select the Email addresses link. If a deleted email address has a '*' in front of it, you will usually need to contact the GApps support team.

Five Day Recycling Rule for GApps Accounts

RIf you delete a users account, you will need to wait 5 days before it can be created again.

Here are options available for recycling the username before 5 days.

Contacting Google Apps Support Team

If you have the Education or Premier GApps editions:
Login as admin. Click on the link 'Manage Account Information'. You'll see contact information as well as your Customer ID and Support PIN Number. If you choose to contact on-line, you will likely need to respond to the email GApps sends you in order for the message to be forwarded to the support team.

Standard Edition

http://www.google.com/support/a/bin/static.py?page=contacting_support.html