Hello,

I had the same problem when I accidentally downloaded all the messages from my Yahoo inbox to my local PC instead of leaving them on the server.
It is impossible to resynchronize your local email account from Outlook, Thunderbird, etc. However, you can use an intermediate email account to do this via IMAP... explanations:

Create an account with a mail provider that supports the IMAP protocol (which allows you to synchronize your locally stored emails with a mailbox on a server), such as Gmail for example.

Once the account is created online, configure your email software with the Gmail account using the IMAP protocol (instructions on Gmail....)
Still in the email software, copy the messages from the Yahoo inbox (local, that is..) to the Gmail inbox (still in the email software)
With IMAP, all messages are synchronized to the Gmail server, with the original dates and senders :) (be careful, this takes time so be patient!)

Now the last step is to import these messages from the Gmail inbox back to the Yahoo inbox (from server to server), which is possible via TrueSwitch:
http://www1.trueswitch.com/?tm=1&kw=email+migration&KW1=Cloud%20Data%20Migration&KW2=Exchange%20Mailbox%20Migration%20Tools&KW3=Email%20Automation%20Software&searchbox=0&domainname=0&backfill=0

And there you go, all the messages back in the Yahoo inbox on the server :)
Good luck, I hope this is clear enough, next time don't forget to leave the messages on the server!! (not like me lol)

to forward your emails to your Yahoo address

--
Skin WLM and Windows? => My website

Yes, indeed, that's the option I should have activated from the start!!!

Unfortunately, I forgot about it and everything was deleted from the Yahoo Mail server,

so how can I transfer everything back from Outlook to Yahoo???

You just need to go to Tools -> Accounts -> Your Yahoo account name -> Advanced:

Check the box "leave a copy on the server".

Hi Elodie, hoping you’re a beautiful blonde!!
The solution is usually simple. Since the messages transferred from Yahoo to Outlook are still present in the Outlook inbox and the Yahoo account is present in Outlook, you just need to move them as follows:
Go to the "inbox in Personal Folders" or the folder where the messages are located and select all the messages you need, then right-click on the selected messages, a dropdown menu will appear and at the very bottom you will find "move to folder" … by clicking, you will find all the accounts present in Outlook, including the Yahoo account. Click twice and you’re done. Don't forget to click "Send/Receive all" to retrieve the messages in the original Yahoo inbox.
But if the Yahoo account does not appear in Outlook and the Yahoo messages are in the "Inbox in Personal Folders" account or elsewhere, there will be another procedure that I will show you.
At the disposal of the blondes. Regards.

Hello,

I found another solution to transfer emails from Outlook to Yahoo:

- Create a Gmail account and configure your Outlook in IMAP. (You need to enable IMAP in the Gmail interface)
- Transfer all the messages you want to the Gmail inbox and wait for it to sync.
- After that, you need to download Yahoo Zimbra Desktop and install it. (https://www.zimbra.com/downloads/zimbra-desktop/
- Now configure Yahoo Zimbra so that the Yahoo and Gmail accounts are present. (Be careful, it might take a long time if there are many emails)
- Now click on the Gmail account, go to options, then the Import/Export tab, and there you export the entire Gmail account (It will take some time)
- And finally, reverse the process so that all messages are on Yahoo. Go to the Yahoo account and there you click Import. And that's it.

You will find all your emails with the real senders and the real date.

If you have any questions, I'm here...

I don't have Outlook 2002, but I use Outlook Express, which, from what I remember, looks a lot like it...

In account management, go to properties
In the general tab, you need to enable synchronization (just a checkbox to check), and in the advanced tab, there is "leave a copy of messages on the server".

Another thank you to dardaaf our savior =)
I made a big mistake while trying to install Outlook for my dad, he was furious, everything had disappeared..
Thank you, thank you!!

thank you Dardaaf...that's a Genius!

Dardaaf!!! My hero^^

Good evening,
I am also in the process of transferring my hotmail emails to outlook.
I am desperately trying to keep a copy on the server, but I can't access the "account properties"; when I click on it, a window appears saying "Windows Live Hotmail settings" with the user information (name, email address, password), I click "ok," but nothing happens.
Does anyone know why it's getting stuck?
Thank youuu!!

Hello, a HUGE and ENORMOUS THANK YOU to everyone for your responses!!!
As for me, here’s the method I used (with a Yahoo account and Outlook 2007) by mixing a lot of your answers, I tried to keep it as simple as possible...

1) Well, like many, I wanted to transfer my Yahoo emails that had all ended up in Outlook, disappearing from my Yahoo mailbox.

2) In Outlook 2007 (Tools/Account Settings), I followed some ideas: email/new. There, I entered my name, my Yahoo address (the same one that was already entered with the email account in POP) except that this time for Account Type I set: IMAP. The thing to know to avoid bugs like (connection problems, etc...) is:
incoming mail server: imap.mail.yahoo.com
outgoing mail server (SMTP): smtp.mail.yahoo.com
additional settings/Advanced Options:
Incoming IMAP server: 993 SSL Connection Type
Outgoing SMTP server: 465 SSL Connection Type
additional settings/outgoing server
check my outgoing SMTP server requires authentication
Test account settings (if no error message appears, the IMAP is working)

3) You can then either transfer or copy/paste your emails as mentioned by others: in your Outlook mailbox, select then transfer or copy/paste. When you go to the Navigation Pane, you will see that you have 2 inboxes (you choose to paste or transfer to the IMAP inbox you just created).

4) For me, it worked. When I logged into Yahoo, the emails were there!!! =)

Good evening everyone
I had the same problem as all of you, I lost all my Yahoo emails. Everything went to Thunderbird, but I would like to send them back to Yahoo. How can I do that? Any ideas? Has anyone managed to solve this problem?

Hello.

I have exactly the same problem: the idiot that I am forgot to check "keep a copy of the emails on the server"...
As a result, I find myself with my Yahoo inbox completely empty...
And my 1700 emails on Outlook 2007...
To my knowledge, we can't do the reverse transfer.
If anyone knows a bit more, I'm interested!

Yes, I'm in the same mess

if someone could provide the solution

dardaaf, I don't know how to thank you!!! You solved one of my biggest problems that has been stressing me out lately!!! A thousand thanks to you!

So here's the hat, hip hip hip hooray

Here's THE best solution !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Thanks to del.appui, who found it !!!
It worked for me!

First, we create a 2nd Gmail address, which I will call gmail2. In gmail2, go to settings, under the "Forwarding and POP/IMAP" tab. There, check to forward emails to the Yahoo address, making sure to keep the emails on the server this time... Then save the changes.

After that, go to the "Accounts and Import" tab, click on "Add a POP3 account", enter the gmail1 address, the one where we made the mistake. Then add the password and login, check the box to keep emails on the server, and leave SSL connection enabled. Labeling and archiving are not necessary, it's up to you. We validate, and there you go!

Normally, gmail2 will retrieve all messages from gmail1 via POP, and gmail2 will directly forward them to Yahoo
Once started, the operation is not instant, but after a few hours everything should be back to normal. In any case, it worked for me...

As I wasn't able to transfer it via Gmail, I did it through GMX / Caramail.

So if you've lost your Yahoo! emails by forgetting to check "leave a copy of the message on the server" in the advanced settings (nobody's perfect, and I made the mistake on two different accounts...), it is possible to recover them from the Yahoo! server using an intermediate email box GMX / Caramail.

1. Create a GMX Caramail account.

https://sinscrire.gmx.fr

2. Set up this GMX / Caramail box on Outlook, using IMAP.

https://support.gmx.com/pop-imap/index.html?si=aaojs.1rxypS.4y4SoY.3K*

3. In Outlook, select the deleted Yahoo! messages from the server, copy (CTRL + C). "Expand" the folder youraccount@gmx.fr, select the subfolder "inbox", paste (CTRL + V).

4. Go to your GMX inbox on the internet to check that the corresponding messages have been uploaded correctly.

5. To transfer the emails from the GMX box to the Yahoo! box, you need to use filters. Click on Settings in the top right, then filter rules (at the bottom left of the Settings frame). Condition: you need to create a filter rule that includes all your emails (for example by taking: from a date before the first to a date after the last email). Action: transfer to youraccount@yahoo.fr. OK, apply, OK.

6. Once the filter rule has been validated, nothing happens. You need to do: Check the rule (in the top right of the settings frame). The number of emails to be transferred will be displayed: verify it against the number of emails in the Yahoo! box. Validate. Do this only once.

7. Now go to your Yahoo! email on the server, empty the trash.

8. Before making this transfer, your Yahoo! emails were present zero times on the Yahoo! server / once in Outlook. When the emails arrive, you will have them once more in Outlook (so once too many since you already had them) and once on the Yahoo! server. In Outlook, delete the received emails, empty the trash. You now only have your Yahoo! emails once in Outlook. Since you deleted your emails in Outlook, on the Yahoo! server, they are now in the trash. Move them to the inbox. Since your trash has been emptied, it only contains these emails, so you just need to select them all.

The goal of the seventh and eighth steps was to eliminate duplicate emails in Outlook while keeping them on the Yahoo! server. There are likely methods to delete duplicates locally without them going to the trash on the server, but I haven't tested them.

9. Check that the number of emails is the same on the Yahoo! server as in your Outlook.

It was long, but it's done. GMX method tested and approved. All Yahoo! messages have returned, unchanged and with the correct date.

--
Lao Tzu said: "One must find the way". I have found it. So you need to find it too.

yes, there are about 300 of them!

and if I send them back to myself, there will be a new sender mentioned: ME

but I would like to keep the original senders, otherwise it will be impossible for me to keep track!

does anyone know how I could resend everything on Yahoo mail??? apparently Outlook doesn't allow it...