If your Gmail inbox is overflowing with thousands of messages, you're not alone. Many users have filled that generous 15GB of free storage with emails, attachments, photos, and Drive files, leading to the dreaded “Account storage is full” notification. While you could purchase additional storage through Google One, there's a clever workaround that lets you reclaim all that space for free—but only if you act quickly. Google has announced that it will end support for the POP3 protocol later this year, which will make it much harder to transfer emails between accounts.

Why POP3 matters and why Google is ending support

POP3, or Post Office Protocol 3, has been a staple of email for decades. It allows you to download emails from a server to a client, and optionally delete them from the server. Gmail's implementation of POP3 made it easy to pull messages from one account into another, creating a simple way to offload old emails to a secondary archive account. However, Google is phasing out POP3 for security and modernization reasons. New users lost access in early 2026, and existing users will see it fully disabled later this year. After that, you'll need more complex manual methods or third-party tools to move your messages. So if you want to keep your free 15GB, this is your window.

The storage problem and your options

Most people don't realize how quickly Google's shared 15GB fills up. Every large attachment, every high-resolution photo in Google Photos (if you choose “Original quality”), every document in Drive counts against the same pool. A typical Gmail user with years of accumulated messages can easily consume 10GB or more just from email alone. The simplest fix is to subscribe to Google One, which starts at $20 per year for 100GB. But paying to store old emails you never look at feels wasteful. Deleting messages manually is tedious, and you risk losing important correspondence. The best free solution is to create a second Gmail account dedicated solely to archiving old messages, then use POP3 to transfer everything over.

How the transfer process works

The basic idea is straightforward: you enable POP3 on your original account, then set up your new archive account to fetch all emails via POP. Once the transfer completes, the originals are deleted from your main account, freeing up that storage. However, you must do this step by step to avoid losing data. Let's walk through the full process.

Before you begin: back up your emails

Even though the transfer is designed to be safe, unexpected glitches can happen. Use Google Takeout to download a copy of all your Gmail messages to your computer or an external drive. This creates a local backup you can keep as a safety net or delete after confirming everything moved. For an account with about 75,000 messages, the backup took roughly two hours. Once that's done, you're ready to proceed.

Step 1: Enable POP on your original account

Log into the Gmail account you want to clear out. Click the gear icon in the top right and choose “See all settings.” Navigate to the “Forwarding and POP/IMAP” tab. Under “POP download,” select “Enable POP for all mail.” Then, under “When messages are accessed with POP,” choose “delete Gmail's copy” so that once your new account imports the emails, they are removed from the original inbox. Click “Save Changes.”

Step 2: Create your archive account

If you don't already have a second Gmail account, create one now. This will be your permanent archive. You'll only use it to store old emails; you don't need to use it regularly, though you must log in at least once every two years to prevent Google from deleting it due to inactivity.

Step 3: Import emails into the archive account

Log into your new archive account. Go to Settings > See all settings > Accounts and Import. Next to “Check mail from other accounts,” click “Add a mail account.” Enter your original Gmail address. In the next screen, select “Import emails from my other account (POP3).” Enter your original account's password. You may need to create a Google App Password instead (see below). Set the port to 995. Check the boxes for “Always use a secure connection (SSL),” “Label incoming messages,” and “Archive incoming messages (Skip the Inbox).” Click “Add Account.” Then choose whether you want to be able to send mail as your original address (optional).

What is a Google App Password and why you might need one

Many users find that their regular Gmail password does not work for POP3 imports, even if entered correctly. That's because Google requires an app-specific password for this kind of less secure application access. To create one, go to myaccount.google.com/apppasswords (you must have 2-Step Verification enabled). Give the password a name like “Gmail transfer,” click Create, and copy the 16-digit code. Use this code in step 5 above instead of your regular password. Save the code somewhere safe, as Google will not display it again. After the transfer is complete, delete the app password from your Google Account for security.

What happens during and after the transfer

Once you've linked the accounts, the archive account will start fetching emails from your original account. This process can take hours or even days depending on the number of messages. In a test with about 75,000 emails, the transfer took roughly two full days. During this time, your original account will move those messages to the Trash folder. After all messages are imported, go to your original account's Trash and empty it manually. Clearing 75,000 messages took about an hour. After that, you'll see a dramatic reduction in storage usage. The test account dropped from 12GB to just 0.66GB, with only 0.06GB from Gmail.

What messages are not transferred

The POP3 import only copies messages from your Inbox and other standard folders. Drafts and Spam are not included. You'll need to handle Drafts manually—either delete them or forward them to your archive. Spam messages are automatically deleted after 30 days, so you can either wait or manually delete them from the Spam folder. Also, any labels or stars from the original account may not carry over exactly; the archive account can apply its own label to imported messages if you selected that option.

Final steps: stop the sync and clean up

Once all emails are transferred, you should disconnect the accounts to prevent future auto-imports. In your archive account, go to Settings > Accounts and Import, find your original account under “Check mail from other accounts,” and click “delete.” Confirm the deletion. You can also remove the app password you created. Enjoy your newly freed storage on your main Gmail account—it's now back to 15GB of usable space. Remember that if you ever need to access those old emails, they are safely stored in your archive account. Just log in there periodically to keep the account active. Google deletes accounts that have been inactive for more than two years, so set a reminder to sign in at least once every 24 months.

This method works best for people who want a clean break from an overcrowded inbox without spending money. It's also a great way to keep your primary account responsive and fresh. But don't wait—once POP3 support ends later this year, this easy loophole will be gone. Take advantage of it now while you still can.

Source: CNET News