L have a gmail email account and l want to receive them on my phone and be able to send them. my email address is eddysthl@gmail. com

You can't change the user ID as far as I know but you can send and receive emails via Gmail under a different identiity. i.e you can be [email protected]

If that is what you are trying to do then please come back to me.

You would also need to enter the new password in Outlook, if you use that to send email. Here is a guide how to to that:
http://support.microsoft.com/kb/2697421

What version of Outlook are you using?

You can combine multiple Gmail accounts into a single, primary Gmail account by using the POP3 Mail Fetcher application built into Gmail.

The Mail Fetcher enables you to retrieve email from POP3 email accounts, including Gmail, and send mail as if from a different email address all from within your primary Gmail account. Configure your primary account to manage your other Gmail accounts with the Mail Fetcher.

Sign in to the Gmail account that you want to use to manage your Gmail accounts.

Click the "Settings" icon, represented by a gear cog, in the top left and click "Mail Settings."

Click the "Accounts and Import" tab.

Click the "Add POP3 Email Account" button.

Enter the email address of your secondary email account and then click "Next Step."

Enter the password of your secondary email account and then click "Add Account."

Click the radio button beside "Yes, I want to be able to send email as
[SECONDARY EMAIL ADDRESS]" and then click "Next Step."

Enter the display name for your secondary email address and then click "Next Step."

Click "Send Verification" and then check your secondary email account.
Click the link contained in the verification email to confirm the integration of that account with your primary Gmail account.

All mail sent to your secondary Gmail is now delivered to your primary account, and when responding your secondary Gmail address is displayed in the From section of the email.

Access all your gmail accounts
http://www.businessinsider.com/how-to-merge-multiple-gmail-addresses-in-one-account-2010-12

Signing in to your Gmail account gives you access to your email messages.
Gmail Web-based email functions as most email services do, with the option for users to send and receive email messages, store contacts and organize messages.

You can opt to store your Gmail login information when signing in so that you do not need to re-enter it each time you access your email.You can access your Gmail account on a computer or a mobile phone.

Open a Web browser window.
Click the address bar and enter "gmail.com." Press the "Enter" key.

Enter your Gmail username and password in the indicated fields.
Check the "Stay Signed In" box to save your username and password for future logins.

Click "Sign In" and wait for your Gmail account to load.

https://accounts.google.com/ServiceLogin?service=mail&continue=https://mail.google.com/mail/&hl=en
Mobile Phone

Press the "Menu" key on your mobile phone and click the "Browser" icon.
Click the Web address bar and enter "gmail.com."

Enter your Gmail username and password and click "Sign In."

http://mail.google.com/mail/

You can combine multiple Gmail accounts into a single, primary Gmail account by using the POP3 Mail Fetcher application built into Gmail.
The Mail Fetcher enables you to retrieve email from POP3 email accounts, including Gmail, and send mail as if from a different email address all from within your primary Gmail account. Configure your primary account to manage your other Gmail accounts with the Mail Fetcher.

Sign in to the Gmail account that you want to use to manage your Gmail accounts.
Click the "Settings" icon, represented by a gear cog, in the top left and click "Mail Settings."

Click the "Accounts and Import" tab.
Click the "Add POP3 Email Account" button.
Enter the email address of your secondary email account and then click "Next Step."
Enter the password of your secondary email account and then click "Add Account."
Click the radio button beside "Yes, I want to be able to send email as
[SECONDARY EMAIL ADDRESS]" and then click "Next Step."
Enter the display name for your secondary email address and then click "Next Step."
Click "Send Verification" and then check your secondary email account.
Click the link contained in the verification email to confirm the integration of that account with your primary Gmail account.
All mail sent to your secondary Gmail is now delivered to your primary account, and when responding your secondary Gmail address is displayed in the From section of the email.

Access all your gmail accounts

my problem is my g mail accont is not open

Signing in to your Gmail account gives you access to your email messages.
Gmail Web-based email functions as most email services do, with the option for users to send and receive email messages, store contacts and organize messages.
You can opt to store your Gmail login information when signing in so that you do not need to re-enter it each time you access your email.You can access your Gmail account on a computer or a mobile phone.

Open a Web browser window.
Click the address bar and enter "gmail.com." Press the "Enter" key.

Enter your Gmail username and password in the indicated fields.
Check the "Stay Signed In" box to save your username and password for future logins.
Click "Sign In" and wait for your Gmail account to load.
Mobile Phone
Press the "Menu" key on your mobile phone and click the "Browser" icon.
Click the Web address bar and enter "gmail.com."
Enter your Gmail username and password and click "Sign In."

Signing in to your Gmail account gives you access to your email messages.
Gmail Web-based email functions as most email services do, with the option for users to send and receive email messages, store contacts and organize messages.
You can opt to store your Gmail login information when signing in so that you do not need to re-enter it each time you access your email.You can access your Gmail account on a computer or a mobile phone.

Open a Web browser window.
Click the address bar and enter "gmail.com." Press the "Enter" key.

Enter your Gmail username and password in the indicated fields.

Check the "Stay Signed In" box to save your username and password for future logins.

Click "Sign In" and wait for your Gmail account to load.

Mobile Phone

Press the "Menu" key on your mobile phone and click the "Browser" icon.

Click the Web address bar and enter "gmail.com."
Enter your Gmail username and password and click "Sign In."

Check for a typo in the SMTP server address. You might also try smtp.googlemail.com instead (port 465 SSL). I've seen both used.