If the administrator enables the 'Import external email' function in Admin, you can import the emails from other email services to NAVER WORKS.

The following are the ways to import external emails:

Import external emails

You can import emails saved in the external POP3 server.

You can add up to 10 external email accounts.
You must enable POP3 for the external email you to register.
When importing emails for the first time, the system imports all emails in the mailbox and then imports the new incoming emails.
The system will not import emails larger than 50 MB.

Click at the top.
Click 'Mail'.
Click at the top right in Mail.
Click 'Import External Email' from the 'Import External Email' section at the bottom.
Enter the information on the external email as follows:
- Select the external email account from which you want to import emails in 'Select account'. If you cannot find the email account on the list, select 'Write in' and then enter the POP address.
- Email: Enter the external email address. If displayed as 'ID', enter only the account name without the domain address.
- Password: Enter the password for the external email account you want to register.
- Connection port: Enter the port number to connect with the external email service.
- Mailbox to save: Select the mailbox to store the imported emails.
- Select icon: Select the icon to indicate the imported emails.
- Keep original: Disable if you want to delete the original emails from the external account after importing them.
- Apply filter setting: Enable if you want to apply filters to the imported emails.
- Apply spam setting: Enable to apply the spam setting.
- Automatically import
  external emails: If enabled, the system will automatically import all new emails every 10 minutes.
  However, if automatic email import fails more than 10 times due to a password error or other issues, the setting will be disabled, and emails will no longer be imported automatically.
Select 'I agree.'.
Click 'Save'.

Migrate IMAP emails

You can import emails saved in an external IMAP server.

Unlike importing external POP3 emails, the system will not import emails received after the migration.
Emails will be migrated in the order of adding the import. The start of the next migration may be delayed depending on the order of the progress.
Deleting unnecessary messages before they are imported will speed up the migration (including emptying the trash).
Notification emails are sent when the migration starts, is in progress, and complete.
If the import is unsuccessful due to the status of the IMAP server or the network, it will restore to the previous status. If you rerun the migration with the same account after completion, the system may save duplicated emails.
After the migration is complete, emails received from the IMAP server will not be migrated.
You should maintain the external IMAP server's connection information (ID, password) until the migration is complete.
Until the migration is complete, any actions, such as deleting or moving the emails saved in the external IMAP server, should not be taken.

You can import emails by manually entering the connection information of an external IMAP server.

Click at the top.
Click 'Mail'.
Click at the top right in Mail.
Click 'Import IMAP Email' from the 'Import External Email' section at the bottom.
On the 'Select IMAP server' field, click 'Write in'.
Enter IMAP sync information.
- IMAP server address: The IMAP server address from which you want to import emails.
- Connection port: The IMAP server’s port.
- Secure connection: The IMAP server’s secure connection information.
- Email address: The information of the account from which you want to import emails.
- Password: The password for the external account.
Select 'I agree.'.
Click 'Import' at the bottom.

You can import emails from Microsoft 365 by OAuth2 authentication.

Click at the top.
Click 'Mail'.
Click at the top right in Mail.
Click 'Import IMAP Email' from the 'Import External Email' section at the bottom.
On the 'Select IMAP server' field, click 'Microsoft 365 (Outlook)'.
Enter your 'Email address', and then click 'Authorize'.
In the new window, agree to log in and access permission.
Check the ' Email is ready to be imported.' message, and then select 'I agree.'.
Click 'Import'.

The administrator can select previously entered IMAP server information to import emails.

Click at the top.
Click 'Mail'.
Click at the top right in Mail.
Click 'Import IMAP Email', from the 'Import External Email' section at the bottom of the screen.
On the 'Select IMAP server', select the template.
Enter IMAP sync information.
- Email address: The information of the account from which you want to import emails.
- Password: The password for the external account.
Select 'I agree.'.
Click 'Import' at the bottom.

You can upload and use .eml format files saved on your PC.