Migrate 2 email accounts from Rackspace to Squarespace email

can you please tell how many total mailboxes and approximate email data size are involved in this Rackspace to Google Workspace email migration?

1. Are your domains/DNS managed in Squarespace already (so we can update MX/SPF/DKIM/DMARC there), or is DNS elsewhere?
2. Roughly how large are the two mailboxes (GB) and do you need contacts/calendars/aliases/forwarders migrated too, or email-only?
3. Any preferred cutover window (e.g., evening/weekend) and is brief downtime acceptable during MX switch?

Hey Paul, To ensure a seamless migration from Rackspace to Google Workspace via Squarespace, could you clarify:

Have you already set up the Google Workspace account through Squarespace, or should I assist with the initial setup and domain verification?
Do you need contacts and calendar data migrated as well, or is the focus solely on email?
Are both email accounts currently using IMAP access, and do you have the login credentials ready for migration?
Would you like me to configure MX, SPF, DKIM, and DMARC records through Squarespace DNS, or should I coordinate with your current provider?
Is there a preferred timeline for the cutover, and will you be able to approve changes during the final verification stage?
This helps me plan a secure, zero-downtime transition with full data integrity.

Hey Paul, To ensure a smooth migration, could you clarify:

Are your Rackspace email accounts using IMAP, Hosted Exchange, or Office 365? This affects how we migrate emails, calendars, and contacts.
Have you already set up the Google Workspace account through Squarespace, and do you have super admin access?
Do you need calendar and contact migration, or only email data?
Will you provide temporary admin access to both Rackspace and Google Workspace, or will you handle configuration on your end?
Are there any specific labels, folders, or filters you want preserved during the transfer?
This helps me plan the correct tools and timeline for your migration.