What is a Gmail migration tool?
A Gmail migration tool signs in to a Gmail account and copies labels, emails and attachments into another mailbox. Corbett Gmail Migration Tool does that on Windows for Gmail, Google Workspace, Microsoft 365, Outlook.com, Yahoo and any IMAP host.
How do I migrate Gmail emails to another account?
Open Gmail Migration Tool, go to Email Accounts and select Add Account. Choose Gmail, enter your address with an app password or sign in with OAuth 2.0, then select Add. Tick labels, select Export, choose your destination, add its login and select Save. Free demo lets you test every step first.
Can I migrate Gmail to another Gmail account?
Yes. Gmail to Gmail migration needs your old Gmail as source and your new Gmail as destination. Labels arrive as labels, and dates, attachments and read status stay as they were.
Can I migrate Gmail to Google Workspace?
Yes. Gmail migration tool takes Google Workspace as destination and sign in through the Google login window. Google also offers its own route, and the Google Workspace email migration page needs a super admin on both sides.
Can I migrate Gmail to Microsoft 365?
Yes. Gmail migration software takes Microsoft 365 as destination and sign in through the Microsoft login window. Mail can land in a primary, archive or shared mailbox. Microsoft also documents a built-in route in its Microsoft Google Workspace migration guide.
Does Gmail migration tool keep my labels?
Yes. Your label tree loads with a message count beside every label, and nested labels arrive as nested folders at your destination. Gmail applies several labels to one message, so a message with two labels appears in both folders.
Why are some Gmail emails missing after migration?
Archived mail with no label lives only in All Mail. Tick All Mail as well as your labels so those messages move, and duplicate skip catches repeats. Spam and Trash stay behind unless you tick them.
Should I migrate All Mail or labels?
Labels give a label-by-label copy that mirrors your folders. All Mail gives a complete copy of every message. Tick both when you want everything, because duplicate skip stops any message landing twice.
Do I need an app password for Gmail?
Yes when two-step verification is on and you use a password sign-in. Create one in your Google account and type it in place of your normal password. Google app passwords help explains how. OAuth 2.0 sign-in needs no app password.
Does Gmail limit how much I can migrate in one day?
Yes. The Google Gmail bandwidth limits page sets IMAP caps of 2,500 MB download and 500 MB upload per day, and Google can suspend an account for 1 to 24 hours when you pass them. Split a large Gmail into date ranges and move one range per day.
Why does my Gmail migration stop with a limit error?
Google throttles IMAP traffic once a daily cap is reached. Wait for suspension to lift and start again with a smaller date range. Gmail Help page on fixing import problems lists common import errors.
Can I migrate only some Gmail emails?
Yes. Set From and To dates, filter by sender, recipient or subject, and limit attachments by size or extension. A ten year Gmail can move with only its last three years.
Can I search Gmail before migration?
Yes. Quick Search finds a keyword from your search bar and highlights matches in yellow. Advance Search offers All Search for every field including calendar and date, and Emails Search for name, subject, To, Cc and content.
Can I preview Gmail messages before migration?
Yes. A reading pane opens beside content, message header, properties, hex and raw message views for every Gmail message.
Can I migrate many Gmail accounts at once?
Yes. Put one row per user in a CSV file, with your Gmail address in one column and your destination in another. Gmail migration tool matches every pair and writes a CSV report when finished.
Will Gmail migration create duplicate emails?
No. Duplicate detection compares messages before migrating and skips ones already present. On a partly filled destination, narrow your label selection or date range first to save time.
Does Gmail migration delete anything from my old account?
No. Your source is read only. Mail is copied out, never moved out, so your old Gmail keeps everything until you close it yourself.
What happens when Google removes POP fetch in 2027?
Gmail Help page on changes to Gmailify and POP says Gmail removes POP fetch, Gmailify and Send as for third-party accounts in January 2027, and that mail already fetched stays in Gmail. A one-time migration moves old mail from those accounts in a way POP never did.
Does it move contacts, calendar and filters?
No. Gmail migration tool moves mail. Filters, forwarding rules, signatures, calendar events and Google Chat history stay behind, so note them down before you close your old account.
Is there a size limit for one Gmail message?
Google import cannot take messages of 150 MB or larger, and Google Gmail bandwidth limits page adds daily caps. Check very large attachments in free demo before a big job.
Can I save Gmail to PST or other files instead?
Yes. Export to PST, MBOX, EML, MSG, PDF, HTML, CSV or TXT. Outlook sets a 50 GB default limit per Unicode PST, so splitting by size keeps files easy to open.
Should I back up Gmail before I migrate?
Yes. Save a copy first with Gmail Backup Tool, then start your migration. Keep 3 copies on 2 types of media with 1 copy off site.
Does my Gmail pass through Corbett servers?
No. Your PC connects to Google and to your destination and moves mail between them. Corbett never holds or forwards a message.
How many emails can free demo migrate?
Free demo connects both accounts, loads your full label tree and gives you every filter and preview. Migration stops at 10 messages per folder, enough to test your route before you buy.
Which Windows versions work?
Windows 11 (64 bit), 10, 8 and 7, plus Windows Server 2016, 2012 R2 and 2008. There is no macOS or Linux build.
How many PCs does one licence cover?
Personal licence covers 5 machines for $99, Business covers 25 for $299 and Enterprise covers 100 for $499. All three are one time payments with lifetime validity, 24/7 support and a 30 day refund.
