Email migration via IMAP

Frequently asked questions

• What does Migrabox do?

  Migrabox copies every folder and message from one email account to another using the IMAP protocol, right from the browser and with nothing to install. The source account remains untouched: nothing is deleted or moved, only copied to the destination.

• How do I migrate, step by step?
  1. Fill in the details of the source account (where the emails will be copied from): IMAP server, port, security type, username and password.
  2. Fill in the details of the destination account (where the emails will be sent to).
  3. Click Test connection on each account to confirm the details are correct.
  4. Click Start migration and follow the progress on screen, folder by folder.
  5. When it finishes, check the summary of copied and skipped messages and any errors in the log.
• Where do I find the IMAP server, port and security type?

  These details are provided by your email provider or hosting company — usually in the help area or the control panel, under email configuration. The address typically follows the pattern imap.yourdomain.com or mail.yourdomain.com.

  The most common combinations are: port 993 with SSL/TLS security (recommended) or port 143 with STARTTLS. When you change the security type in the form, the port is adjusted automatically.

• Are messages deleted from the source account?

  No. The migration is read-only at the source: messages are copied to the destination and the original account stays exactly as it was.

• What happens if I run the migration more than once?

  Messages that already exist at the destination are detected and skipped, so there is no duplication. This also means that if the migration is interrupted, just start it again: it will pick up where it left off, copying only what is still missing.

• Can I close the page during the migration?

  It is not recommended: the browser drives the migration, so keep this tab open until it finishes. If the page is closed by accident, nothing is lost — open the tool again, fill in the same details and restart the migration; it will continue from where it stopped.

• Are my passwords stored?

  Credentials are used only during the migration, written to a temporary state file on the server that is removed automatically when it finishes. For safety, prefer an app password when your provider offers one, or change the password after the migration is complete.

• How long does the migration take?

  It depends on the number and size of the messages and on the speed of the source and destination servers. Small mailboxes take a few minutes; accounts with tens of thousands of messages can take a few hours. Progress is shown in real time, folder by folder.