What is the best way to copy/move folders from one Yahoo account to another Yahoo account?

Jan Mishkin
Jan Mishkin used Ask the Experts™
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I have a Yahoo account that was used for both personal and business.  I have created another email account and want to move all the personal emails from the first account to the new account.  We have identified which are personal and which are business but I am having a hard time finding a platform to put both email accounts into and then start moving folders. I thought I could use Outlook Express but just found that it is not in Windows 10.  Thanks for any help you can give.
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Fractional CTO
Distinguished Expert 2018
Commented:
Setup both accounts in your email client under different account names.

Then, very carefully, drag + drop mail from one account to another.

Caution: Only do a few 100 email at a time. If you try moving 1,000s or more email, you may crash one or both accounts + trying to get them back in sync will be difficult.
Jan MishkinIT Manager

Author

Commented:
Will Yahoo allow me to add a 2nd account to my original account?  I spoke with a Yahoo tech yesterday and the tech said I had to forward each message individually and that there was no other way to do it.  If he is wrong, can you give the steps to adding a 2nd account?
Many thanks!
Jan MishkinIT Manager

Author

Commented:
I now see I can SYNC 2 accounts but can I then turn off the syncing in Outlook so they do not sync in the future?  II would move all files to the new account and then turn off the sync and then delete those directories not needed in each account.
David FavorFractional CTO
Distinguished Expert 2018

Commented:
Tech is wrong... well... better said, you must use IMAP4 to access Yahoo for this to work.

1) Setup your new Yahoo account.

2) Pull up your email client, like Thunderbird.

3) Setup 2x accounts using IMAP4 settings for each individual account.

https://help.yahoo.com/kb/SLN4075.html?guccounter=1 provides details of accessing your Yahoo mail via the IMAP4 protocol.

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