I recently ran into a problem migrating emails from Blue Host to CPanel as the servers handle emails differently.
In most instances you can upload the backups into File Manager, but the format for Blue Host emails is Maildir whilst our server use Mdbox format .
I tried to transfer using the export and import tool in Hordle but this created a Proxy issue. You can transfer emails manually if there are not too many, but this is not ideal.
Below is the Impsync tool that transfers the emails for you.
Using Hordle to import emails
1. Using Hordle to export emails - MBox file
In Cpanel go to emails and webmail and then select Hordle, if may default to Roundcube so click on Hordle (Roundcube does not have export and import facility).
Right click on each folder i.e. sent folder and select export.
Download MBox file or MBox zip file.
Download the back up to your computer.
2. Import emails using Hordle - MBox file
To carry out the move you will need access to the website, phymyadmin and File Manager.
Every host provider has a different control panel, or hosting dashboard, so find where you can access the database, phpmyadmin and gain access to File Manager.
3. Import individual emails - eml file
If the files are too large and the server hangs you can import files individually by downloading the email to you pc and uploading back into the new server using Hordle.
4. Mailbox Imapsync Online
The best way to import files from server to server is by using the Mailbox Imapsync online tool.
Select the box to check credentials first to see if you find any errors. Read the report for errors before proceeding to transfer.
Summary - transferring emails from host to host
If you are changing host providers then it is import you understand how your emails are managed prior to the move.
If you are using Outlook and download the emails using POP3 then you will be fine to change the server as you already have all the emails.
The issue arises when you are using Webmail or IMAP as the emails stay on the server, so when you switch server all the old emails stay on the old server. In this case create backups and pass the backups to your new host provider.
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