I wrote some tools to help with migrating an existing imap account from one server to another, so that you can keep your emails when you switch your domain name to a new provider. I think normally your email client might do this for you automatically just by you changing the server settings, but I have some users only using a webmail client, meaning they don’t have a local copy to sync to the new server. Plus it’s always good to have a backup.
To solve this I wrote some scripts that let me download an entire mailbox and then reupload it to a new server. You can find them here: https://github.com/Tethik/imap-tools
I initially intended to use these for migrating a domain name and the email to a new provider. Unfortunately I never got to carry out the migration, so I only got to try this out with some test accounts. The way I imagine the whole process of moving email servers with a domain name looks something like this:
- Download all accounts and their emails locally using my script.
- Do the domain transfer.
- Set up the new imap accounts at the new provider.
- Use the upload script for each account to upload all old emails to the new accounts.