Google Apps users, please follow the default instructions unless otherwise noted, replacing 'your_domain.com' with your actual domain name.
Many clients will automatically configure the appropriate IMAP connection settings for your account, but confirm that the connection settings your client configures are the same as what's listed below.
If you're using a client that's not listed above, you can also use the following information to configure your IMAP. If you have problems, contact your mail client's customer support department for further instructions.
If your client does not support SMTP authentication, you won't be able to send mail through your client using your Gmail address.
Also, if you're having trouble sending mail but you've confirmed that encryption is active for SMTP in your mail client, try to configure your SMTP server on a different port: 465 or 587.