How to Merge Gmail Accounts
Follow these general steps to access your Gmail accounts from a single account.
From your primary email account, select the Settings gear in the upper-right corner. Select See all settings. Go to the Accounts and Imports tab. Choose Import mail and contacts. In the window that appears, log in as the other account and follow the on-screen instructions to import all the messages. Repeat this step for every account from which you want to import emails. You can check the progress of the merge from the Accounts and Imports page. Add each secondary address as a sending address to the main Gmail account. This way, you can send emails from the accounts you added in step 1 right from your main account. In the Send mail as section, choose Reply from the same address the message was sent to. If you don’t want to reply from the second account, choose to send mail from your primary, default account. After all your email has been imported, set up forwarding from the secondary accounts so that new messages always go to your primary account.
Now that the existing emails from your accounts are in your primary account, and each is set up to forward new messages to your main account indefinitely, you can safely remove the Send mail as accounts from the Accounts and Imports page.
You can keep messages there if you want to send mail under those accounts in the future, but it’s no longer needed for the mail merge. All your existing and future messages are stored in the primary account.
