Switched Email Providers? Check These Five Things Before You Trust the Move
Moving to a new email provider usually feels finished once the new inbox works. You can send, you can receive, and the old account is cancelled. But a migration changes several DNS records at once, and the problems from a half-finished one often take weeks to show up.
Before check SPF DKIM DMARC consider the move complete, check these.
MX records point only to the new provider. If any old MX records are left behind, some incoming mail may still go to the old provider, sometimes to a mailbox that no longer exists.
SPF lists the new provider and drops the old one. Old SPF entries are mostly harmless, but a missing new one means the mail you send from the new provider can fail authentication straight away.
DKIM is set up for the new provider. DKIM keys are specific to each provider. The record that worked with your previous host won't sign mail sent through your new one. You need to publish the new provider's key and switch on signing.
DMARC is still in place and still makes sense. The DMARC record usually survives a migration, but if its reporting address was on the old system, the reports are now going nowhere.
Other tools still authenticate correctly. Your CRM, helpdesk and newsletter platform may have been set up around the old provider. Check that each one still passes.
Doing this by reading DNS records is slow and easy to get wrong. A free SPF, DKIM and DMARC checker checks all of them, plus your MX records, in one scan. Run it right after the migration and again a week later, when DNS changes have fully propagated.
A migration is only finished when the new provider's mail authenticates properly, not just when the new inbox works. domain email checker of checking now saves a confusing week of "did you get my email?" later.