A single domain serves either Google Workspace or Maildoso SMTP — not both. Google and SMTP use different DNS/MX configurations, so each domain has to be assigned to one of them, and the split is not automatic.
On combo plans (for example 150 Google + 150 SMTP), if all of your domains were connected to Google Workspace during setup, the SMTP half of your plan has no domains to land on yet — even though your SMTP allotment is intact. This is why you may see "all my domains show Google, I can't use my SMTP."
What to do:
Decide how many domains you want on Google vs SMTP.
Contact support — we set up the SMTP-side domains for you on the backend (switching some domains from Google to SMTP, or adding SMTP domains).
If you created SMTP mailboxes by mistake and want Google Workspace on the eligible domains (or vice versa), let support know — see the note below on current Google Workspace availability.
Can I switch an existing domain/mailbox's provider (SMTP ↔ Google Workspace)?
SMTP → Google Workspace: this is only possible if you already have unused Google Workspace slots on your plan. New Google Workspace purchases are currently paused, so we can't create additional Google Workspace slots to convert a domain that has no spare allotment — contact support and we'll check whether you have unused slots available.
Google Workspace → SMTP: unaffected, still fully supported — contact support with the domain(s) you want switched and we'll make the change on the backend.
The switch itself is free — we don't charge extra just to convert a domain's provider.
Once the subscription reflects the correct mix, mailboxes on the affected domain are recreated under the new provider. Since this is a new mailbox on the new provider, treat it like any other new mailbox: a fresh warmup is needed.
This is a manual, staff-performed change — not something you do yourself in the dashboard. Contact support with your account email, the domain(s), and the direction you want to switch, and we'll take care of the rest.