How to Export Yahoo Mail and Move to Another Provider

The short answer to how to export Yahoo Mail to another provider: use IMAP to copy the mailbox, not Yahoo's download button. Connect Yahoo and your new account in the same desktop mail client with an app password, then copy folders across. Messages arrive with folder structure, read state and dates intact.

Yahoo's own data download is a privacy export, not a migration tool. It arrives as JSON, can take up to 30 days, and is not something you can import into a new mailbox — a useful archive, but a bad way to move.

This guide covers the full exit: what moves, what doesn't, the order to do it in, what breaks on the day, how to roll back, and the Yahoo-specific trap that catches people a year later.

What actually moves, and what doesn't#

Almost everyone underestimates this, then discovers the gap after they've stopped checking Yahoo. Mail moves well; everything attached to the mailbox rather than inside it moves badly or not at all.

IMAP, as defined in RFC 9051, is a protocol for synchronising messages and folders, full stop. It has no concept of filters, signatures, contacts or calendars, so none of those travel with a copy.

Three routes out, and when each one is right#

There are only three mechanisms, and the differences between them decide how much you lose: the IMAP copy is the default, the provider-side import is easier but lossier, and the data download is an archive, not a move.

Pre-migration checklist#

Do this before copying a single message. Each item takes a few minutes now and is painful to reconstruct later.

• Create the destination account first, and verify you can send from it.
• Generate a Yahoo app password. IMAP, POP and SMTP access from outside Yahoo's own apps requires it; your normal password will be rejected.
• Check free disk space. Years of attachments can add up to tens of gigabytes, and the copy lands on your machine first.
• Export Yahoo Contacts to CSV from the Contacts page before touching the mail.
• Export Yahoo Calendar to ICS if you use it.
• Screenshot your Yahoo filters, signature and vacation-reply text.
• List every service that emails your Yahoo address: bank, tax, utilities, domain registrar, two-factor recovery. This list is the real migration, and it's longer than you think.
• Pick a date you can leave both mailboxes running for at least a month afterwards.

Step by step: copy the mailbox over IMAP#

Thunderbird is the usual tool here: free, cross-platform, and happy to hold two IMAP accounts side by side. Apple Mail and Outlook do the same job with an identical sequence.

1. 1

   Generate a Yahoo app password

   Sign in to Yahoo Account Security, find the app-password option under external connections, and generate one. Copy it somewhere temporary — Yahoo shows it once.

2. 2

   Add Yahoo to the desktop client

   Incoming: imap.mail.yahoo.com, port 993, SSL/TLS. Outgoing: smtp.mail.yahoo.com, port 465 with SSL or 587 with STARTTLS, authentication required. Username is your full Yahoo address; password is the app password, not your login password.

3. 3

   Add the destination account in the same client

   Use the new provider's IMAP settings. Both accounts now sit in the same folder tree, which is what turns the copy into a drag rather than an export-import.

4. 4

   Force a full download of the Yahoo side

   In Thunderbird, right-click the Yahoo account, choose Subscribe, and tick every folder, then open each one once so the client fetches the headers — nothing copies that it hasn't seen.

5. 5

   Create the destination folders, then copy in batches

   Make an empty folder on the new account, select a few hundred messages in the matching Yahoo folder, and drag them across. Small batches are slower to start but far easier to resume than one 40,000-message drag.

6. 6

   Work oldest to newest, one folder at a time

   Start with archives, finish with the inbox. If the copy stalls, you know exactly where, and today's mail is still where you left it.

7. 7

   Verify by count, not by feel

   Compare each folder's message count on both sides, then open the oldest and newest message in a few folders and confirm attachments open.

8. 8

   Import contacts on the destination

   Import the CSV exported from Yahoo Contacts into the new address book. Expect to fix a handful of field mappings by hand — column names rarely line up perfectly.

What about Yahoo's own data download?#

Yahoo does offer an export. Under Manage Your Information in your privacy controls, Download My Data lets you select products and request a download; Yahoo emails you when it's ready.

Two things make it unsuitable as a migration route. Yahoo's help page says it can take up to 30 days to become available and stays downloadable for only 30 days after that — and the data arrives as JSON, which Yahoo itself describes as hard to read at a glance.

JSON is not mbox and not EML, and no mail client imports it as mail. Request it for a personal record of what Yahoo held, and treat it as a filing-cabinet copy alongside your migration, never as the migration itself.

What breaks on the day, and what to do about it#

None of these are catastrophic on their own, but all of them are annoying to discover a week after you've told people your new address.

Rollback plan#

An IMAP copy is not a move — that's the whole safety story. The Yahoo originals sit untouched on Yahoo's servers the entire time.

So rollback is mostly about not destroying the source. Don't delete anything from Yahoo during the copy, and avoid any tool that offers to move mail rather than copy it. If a drag between accounts behaves like a move, hold the modifier key that forces a copy and verify the Yahoo folder count is unchanged afterwards.

If the destination turns out wrong for you, just keep using Yahoo and redo the copy into a different provider — nothing about the first attempt needs undoing.

The one irreversible action here is closing the Yahoo account, and there's no reason to do it early: Yahoo gives a 30-day window to reactivate a closed account in most countries, longer in a few, after which it can't be recovered.

When the copy is finished, leave the accounts in your desktop client rather than removing them — it's now holding a complete local copy of everything you moved, the cheapest possible backup while you're still finding out what you forgot.

Doing it without downtime#

The goal is that no message is ever reachable only in a mailbox you've stopped opening. That means an overlap period, and on Yahoo it's harder to arrange than on most providers.

Yahoo removed automatic forwarding from free accounts: its help page now directs you to Yahoo Mail Plus for forwarding in Settings, and notes the option isn't available everywhere — so the classic forward-everything plan either costs money or isn't available, depending on where you live.

The free alternative is to pull rather than push: leave Yahoo connected over IMAP in whichever app you now live in, alongside the new account. New Yahoo mail keeps arriving in front of you, you reply from the new address, and the mailbox stays legitimately active while you work through your list of services.

Then update senders in priority order — anything that can lock you out first (bank, domain registrar, two-factor recovery), then billing, subscriptions, then people. Most of that list only surfaces by watching what still lands in Yahoo over the following weeks, which is exactly why the overlap exists.

Should you delete the Yahoo account afterwards?#

Usually not, and certainly not in the first year. A live Yahoo address you check occasionally is a cheap safety net for every account you forgot to update; a deleted one turns those into silent failures.

But leaving it alone isn't the same as leaving it running. Yahoo's inactive mailbox policy deletes the emails, folders, contacts and settings if you don't access the mailbox for 12 months, and it stops receiving new mail. Yahoo sends a reminder 90 days before — and signing in to the account isn't enough; you have to open the mailbox itself.

Yahoo also states that not signing in at all for 24 months schedules the whole account for deletion. So the honest options are: open the mailbox once or twice a year on purpose, or close it deliberately once your update list is finished — just don't drift into deletion by accident and lose the safety net.

Where AI Emaily fits#

We build AI Emaily, so treat this as the interested part of the page. It's not a migration tool: it won't copy your Yahoo archive anywhere, and the IMAP drag above is still the right way to move the mail.

What it does cover is the overlap period, the part that actually drags on. AI Emaily connects Yahoo over IMAP alongside Gmail, Outlook or any other account in one inbox, so the months of watching what still arrives at the old address don't mean living in two apps. Search runs across both — how you find the sender you forgot to update.

Sending stays approval-first, with an audit trail and undo behind anything the agent does. It's a 7-day free trial on Pro and Autopilot, card required, nothing charged if you cancel before day seven.