You do not need a three-month project. You do need to avoid January 2027 with nothing changed. This list fits in an afternoon.
Inventory
- List every account in Check mail / Gmailify.
- Note whether the source has IMAP.
- Mark which ones are critical (customers, invoices) and which are noise.
Decision per mailbox
- Critical + you want Gmail web: sync.
- Critical + phone is enough: IMAP in the app.
- Noise: temporary forward or shut it down.
- Team domain: evaluate Workspace.
Test
Send a test message to each critical mailbox and confirm delivery, labels, and that it did not land in spam. Repeat the next day.
If you choose hosted sync, GetPopMail has a trial so you can validate the flow before you cut the old POP setup. Leave Mail Fetcher on until you see a clean week.
Google’s date is a line on the calendar. Your checklist is what prevents the scare.