Recovering permanent deleted email

Hello @Aliakbar 

Welcome to C2C!

Since you didn't explicitly mention if you are using Google Workspace, I assumed it and I moved your question to the Google Workspace Admins community. There some of our members and Google Workspace experts will be able to give you a proper answer. 

Also, I did a quick look at the Google Workspace Admin support page and found this article that I think will help you. The article says:

When a user deletes a Gmail message, it stays in their Trash for 30 days. These are the options for retrieving and restoring deleted messages:

• For up to 30 days after deleting, users can recover their own messages from the Trash by following the steps in Recover deleted Gmail messages.
• After 30 days, messages are permanently deleted from the Trash, and can't be restored from the Trash by users or administrators. This article describes options that admins have for recovering deleted messages after 30 days.

Restore messages from the Admin console

After 30 days, admins have 25 more days to restore deleted messages from the Admin console. Follow the steps below, in Restore Gmail data from the Admin console.

After these additional 25 days, messages are permanently deleted from the Admin console, and admins can't restore them.

Retrieve data from Vault

If your organization uses Google Vault, you might be able to retrieve data older than 25 days. If the data was subject to retention rules or holds, you can search for and export the retained data. You can’t directly restore the data to the user’s Gmail account. For details, go to Get started with Vault search and export.

I hope this information can be useful to you!

Cheers,

--VC