How to create a new a mailbox in your cPanel interface:

Log into your cPanel interface via a web browser.

Once logged in, click on “Mail.” The screen will change to display new options.

In the new screen, click on “Manage/Add/Remove Accounts” which can be found near the top of the options list. The screen will change to display your existing mail accounts, and new options

At the very bottom of this new screen, click on “Add Account” The screen will change to display account creation input fields.

Here is where you will create a new box. “E-mail:” is where you will give it the desired box user name. If the account domain is example.com and I entered user in this field, my email address would be user@example.com. This will also serve as our login.

The center field is for creating a “Password” and you need to input the password that will be used to authenticate with the email server. This will be used when accessing mail from your mail program or web mail.

The final field is for entering a total storage capacity of the mailbox.“Quota (optional):” is where you choose total amount of disk space in Megabytes that the mailbox you are creating will be allowed to consume. This is set by default at 10 Mb which is reasonable for most users. Those that accept large attachments should select a higher number. An empty field serves as unlimited, or rather limited only by the amount of disk space the parent account is allotted by the server administrator or reseller that created it.

If the mail box or domain account exceeds its quota new mail will not be written to the mailbox file and will consequently not display in the mail client accessing it. Some mail loss could occur in these situations and it is advisable to avoid them by monitoring your mail usage on a regular basis. (DELETE MAILS OFF SERVER)

Click the button on the lower left marked “create”. This will build your account. Your screen will change to display a successful account creation screen. An example of such is as follows.

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Account Created

The e-mail account user@example.net with the login user+example.net and password X#X#X# with a quota of 10 megs was successfully created.
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If you receive an error in this message please contact us. You may also notice that a + is shown in the login string not an @ as noted at the end of the setup process. At present both + or @ will are widely accepted.

Your POP Mail account is now created; you may close the cPanel window or click the home icon in the upper right corner to go back to the main screen.

Also see: How to create a mail forwarder in cPanel