Google has security measures in place to protect your mailbox against unauthorized access. Therefore, you have to take extra steps to allow access for our service to migrate your mailbox. Please follow the instructions given below to get your migration going.

With 2-Step Verification (https://support.google.com/accounts/answer/185839):

  • Google may reject extraordinary login attempts, even if you provided the correct credentials
    • The best way to circumvent this, is to create a so called application-specific password for our service. When submitting the Gmail account for migration, you should use this password.
  • Attachments up to 25 MB (in total per message)
  • IMAP may need to be manually activated
  • Google Mail allows for ca. 2 GB mail traffic per day. Beyond this limit, an account may be blocked for 24 hours. While our service respects this limit (which results in a slower migration) we can not completely rule out problems. You should not access your Google Mail account with other devices during the migration process (e.g., mobile phone synchronization or other email clients).
  • Since Google Mail is restricted to one connection and the 2 GB traffic limit per day, the migration of large accounts may take considerable time.
  • Please not that emails that have no label assigned ("Archive") will not be migrated. Please assign a label to those mails before starting a migration. You can find all unlabled emails by searching for "has:nouserlabels" in Gmail.
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