Ow can i recover my mail messages

Depends a lot on which email system you are using and on what device
https://www.ccleaner.com/recuva/features/recover-deleted-emails

https://support.google.com/mail/answer/7401?co=GENIE.Platform%3DDesktop&hl=en

https://support.office.com/en-us/article/restore-deleted-email-messages-in-outlook-com-cf06ab1b-ae0b-418c-a4d9-4e895f83ed50

https://www.cnet.com/how-to/how-to-retrieve-a-deleted-e-mail-on-your-iphone/

https://help.yahoo.com/kb/recover-lost-deleted-emails-sln2552.html

In Yahoo Mail:

1. Click Trash.
   - Your Trash folder's contents appear to the right.
2. Select any messages you would like to save.
3. Click Move.
   - A pop-up with your folder list displays.
4. Click the folder you want to move the messages to.

Your selected emails move to the folder you indicated.

Not seeing emails in your Trash? Yahoo Mail regularly empties the Trash folder. Once it's been emptied, they're permanently deleted from the Yahoo Mail servers.

Learn the options for recovering emails in our restoring permanently deleted emails and IMs help article.

Recover lost or deleted emails and IMs

HOW LONG HAS IT BEEN INACTIVE ?

Your Yahoo ID is linked to a broad array of Yahoo services, from Yahoo Messenger to online games. A Yahoo ID must be deleted from a laptop or desktop, not a mobile device. Only get rid of your Yahoo ID if you're certain you'll never need it again, because there is no option to change your mind and get your ID back once it's gone.

Deleting a Yahoo ID
When you delete a Yahoo ID, you lose access to all programs associated with it, including Yahoo Mail, Yahoo Groups and Yahoo Finance Portfolio. Deleting your Yahoo ID will not remove your listing from the Yahoo People Search, however, so your profile will continue to appear in search results unless you delete your listing before deleting your ID. Lost Information b> When a Yahoo ID is removed from the system, Yahoo deletes all of the data associated with the account, including your email messages. You cannot recover this information once it is removed; creating a backup copy of your data on a computer or external storage device is the only way to preserve it for future reference. b> Reactivating Dormant Email As long has your Yahoo email has only gone dormant -- and not been deleted as the result of an ID termination -- you can reactivate the account. Yahoo automatically makes an email account dormant if the user hasn't signed in more than four consecutive months. To reactivate such an email account, you must sign in via computer using your Yahoo ID and password, and choose "Reactivate Without Account Protection." Yahoo permanently deletes old emails when an account is deactivated, but you can resume sending and receiving email once you reactivate the account. b> Considerations b> Some premium services are not cancelled along with a Yahoo ID deletion. If you signed up for a paid service, such as Yahoo Mail Plus, the company recommends manually canceling the service -- independent of your Yahoo ID deletion -- to avoid future bills. Canceling a Yahoo ID doesn't disqualify you from signing up again in the future with a new ID, but you cannot reactivate the same ID. Hope this helps.

Your Yahoo ID is linked to a broad array of Yahoo services, from Yahoo Messenger to online games. A Yahoo ID must be deleted from a laptop or desktop, not a mobile device. Only get rid of your Yahoo ID if you're certain you'll never need it again, because there is no option to change your mind and get your ID back once it's gone.

Deleting a Yahoo ID
When you delete a Yahoo ID, you lose access to all programs associated with it, including Yahoo Mail, Yahoo Groups and Yahoo Finance Portfolio. Deleting your Yahoo ID will not remove your listing from the Yahoo People Search, however, so your profile will continue to appear in search results unless you delete your listing before deleting your ID. Lost Information b> When a Yahoo ID is removed from the system, Yahoo deletes all of the data associated with the account, including your email messages. You cannot recover this information once it is removed; creating a backup copy of your data on a computer or external storage device is the only way to preserve it for future reference. b> Reactivating Dormant Email As long has your Yahoo email has only gone dormant -- and not been deleted as the result of an ID termination -- you can reactivate the account. Yahoo automatically makes an email account dormant if the user hasn't signed in more than four consecutive months. To reactivate such an email account, you must sign in via computer using your Yahoo ID and password, and choose "Reactivate Without Account Protection." Yahoo permanently deletes old emails when an account is deactivated, but you can resume sending and receiving email once you reactivate the account. b> Considerations b> Some premium services are not cancelled along with a Yahoo ID deletion. If you signed up for a paid service, such as Yahoo Mail Plus, the company recommends manually canceling the service -- independent of your Yahoo ID deletion -- to avoid future bills. Canceling a Yahoo ID doesn't disqualify you from signing up again in the future with a new ID, but you cannot reactivate the same ID. Hope this helps.

Visit Mail.yahoo.com and log in to your Yahoo! Mail account. Click on the folder marked "Trash" on the left-control panel. View the folder's contents to see if your message is inside. If it is, place a check next to the message and click "Move To>Inbox." This restores the deleted message. If it's not, continue to Step 2.
Visit the Yahoo! Deleted mail retrieval page (see Resources). Click on the appropriate link to retrieve your mail, depending on which version of Yahoo! Mail you use. For New Yahoo! Mail, select "New Yahoo! Mail." If you are using Yahoo! Mail Classic, click "Yahoo! Mail Classic."
Type your name into the entry box, and then type your Yahoo! Mail user name. Select the date and time that you would like to roll your inbox back to. For best results, select a date and time 24 hours prior to the current time; this will improve the chances of Yahoo! being able to recover your deleted mail.
Type in a short message to give to the Yahoo! Mail account specialist, if desired. This is optional. If you'd like to describe your situation, feel free to do so, although it will not improve the chances of the specialist recovering your deleted mail. Click "Submit." Yahoo! will get back with you as soon as possible. You'll receive an email regarding the results of the email recovery.

Losing important emails or accidentally deleting emailsthat you still need can be frustrating. Good news is that Yahoo! Mail providesways to retrieve deleted messages. In fact, whenever you delete a message fromyour inbox, it is automatically transferred to a "Trash" folder incase you need it again in the future. In case your "Trash" folder isemptied, you can still recover deleted messages using Yahoo's"Restore" feature ? Log in to your Yahoo! Mail account.Navigate to the "Trash" folder located at the left portion of thescreen, and then check if the deleted message is there. ? Open the message and select the"Move" option in the Yahoo! mail toolbar. Select "Inbox" orany other existing folder into which you want to transfer the message. It willthen be immediately transferred to your chosen folder. ? Use the "Search" option atthe upper portion of the window if you do not want to browse through severaldeleted emails. Type the email address of the sender or other keywords relatedto the email message and click on "Search." ? Use the "Yahoo! MailRestore" feature to recover mails that have been deleted in the past 24hours. This is if your trash folder is empty and your deleted emails are nolonger available. Click on the "Help" button at the upper portion ofthe screen and then select "Help" once again from the options thatappear. ? Select "Emailing: TheBasics" from the list of "Help topics." Click on "Deletingand Recovering Mails," then choose "Restore Lost or DeletedEmails." ? Read the instructions on how torecover emails that were deleted within the last 24 hours. Complete the requiredform and hit "Submit." You will be prompted once emails are restored.

Hii...
I am Frank....
If you are using yahoo email account but your emails deleted from your inbox and you are unable to recover then you can follow some given steps given below:-
Go to the Trash folder.Open the desired message. You can also check it and any further messages you want to undelete in the message list.Click Move in the Yahoo! Mail toolbar.Select Inbox or any other folder to recover the message. You can also drag and drop the email to any folder.For the more info visit here http://www.yahoosupportnumber.net/blog/facing-problems-to-restore-deleted-yahoo-mails/ and get instant help & solution.

Contact yahoo to correct the problem