The risk is a workflow dependency, not the existence of a Gmail account
Google has announced changes to several ways Gmail on the web interacts with third-party accounts, with the affected functionality scheduled to be removed in January 2027. The important migration question is not “Do we use Gmail?” but “Which users depend on Gmail web to send as, fetch from, or manage mail for a non-Gmail account?” An organization can use Gmail extensively while having no dependency on the retiring third-party workflows.
Inventory third-party Send as separately from aliases inside managed mail
A user may have several From identities for different reasons. Some are aliases or addresses managed within the same mail platform; others use Gmail web’s third-party Send as path. Capture which identities rely on an external SMTP configuration, who owns the external mailbox, and whether replies or authentication depend on that route. This prevents a blanket migration that disrupts identities which were not actually affected.
POP fetching and Gmailify need mailbox-level replacement decisions
When a user depends on Gmail web to fetch messages from another account by POP or to apply Gmail features through Gmailify, the replacement may be forwarding, a provider-native client, a modern synchronized account in a supported app, or a platform migration. The right choice depends on whether Gmail was being used as the system of record, a convenience inbox, or a bridge between two providers.
Mobile and desktop workflows must be tested independently
A retiring Gmail web feature does not automatically mean every mobile or desktop access path disappears. Document where each user actually reads and sends mail, which app owns the credentials, and which server performs synchronization. The replacement plan should preserve the user-visible behavior that matters rather than recreating a legacy architecture simply because it existed.
Authentication should be reviewed during the transition
Changing how a third-party address sends can alter the envelope sender, DKIM signing domain, relay host or visible headers. Use the migration as an opportunity to verify SPF, DKIM and DMARC for the new path. A replacement that restores the user interface but silently changes sender authentication can create a deliverability problem after the migration appears complete.
Build a user-specific transition list before January 2027
Mailybox’s transition planner converts selected Gmail dependencies into a focused checklist without requiring access to the user’s Google account. For larger organizations, pair that planning model with an internal inventory of affected users, external account owners and business-critical From identities. Schedule representative testing well before the cutoff so the change is a controlled migration rather than an inbox incident.
Verify the evidence
Use the live analysis that matches this workflow instead of relying on a generic status check.