Can one domain have two email providers?
Yes. One domain can use two email providers at the same time: each person’s mailbox lives with one of them, mail is routed to wherever that mailbox is, and the outside world sees one company. Google Workspace and Microsoft 365 both document how. This guide explains why many forum answers say it cannot be done, the three ways it can, and the DNS records to get right.
Updated 1 November 2026.
Why the usual answer is “no”
A domain’s MX record tells the world where to deliver its mail, and it points at one system. Several MX records do not split people between providers: they are backups of the same system, and senders choose by priority, or at random between equal priorities. Point MX records at two different providers and mail for each person lands at either one, so about half of it bounces.
That much is true. What the short answer leaves out is that the first provider can route on: it delivers mail for its own people and passes mail for everyone else to the second provider. That is a supported feature of the big providers, not a workaround.
Three ways to use two providers
| Way | Addresses | How mail is routed | Good for |
|---|---|---|---|
| Split delivery (internal relay) | Everyone keeps name@yourcompany.com | The MX goes to one provider; it forwards mail for people it does not host to the other | Keeping a few people on an office suite and the rest on cheaper email |
| Dual delivery | Everyone keeps name@yourcompany.com | Every message is delivered to both providers | Trials and migrations; you pay for everyone twice |
| A subdomain | Some people become name@staff.yourcompany.com | The subdomain has its own MX at the second provider | Separate groups that do not mind a different address |
Google documents the first as split delivery in the Admin console; Microsoft as an internal relay accepted domain with an outbound connector. Our step-by-step guides cover both: Google Workspace split delivery and Microsoft 365 internal relay.
The DNS records you must get right
| Record | What to publish | The common mistake |
|---|---|---|
| MX | The provider that receives first, only | MX records at both providers |
| SPF | One TXT record including both providers | Two SPF records, or more than 10 lookups |
| DKIM | Each provider’s key, under its own selector | Turning DKIM on at only one side |
| DMARC | One record for the domain | Moving to a strict policy before both sides pass |
After the change, send a test from an outside address to one person on each side, and one between the sides. Our free domain email checker reads your MX, SPF (with its lookup count), DKIM and DMARC and says what to fix.
What the two sides do not share
- Calendars and free/busy times. People can still send and accept meeting invitations by email, but cannot see each other’s free time.
- One address book. Each provider has its own directory; add the other side’s people as contacts.
- Shared drives and chat. Documents and chat stay with the office suite, for the people who have it.
If your whole team lives in one shared calendar or in Docs and Teams every day, keeping everyone on one provider is the better choice.
With GINbox as the second provider
The most common reason to split a domain is cost: a few people need Google Workspace or Microsoft 365, and the rest only need email. With split delivery in GINbox, Google or Microsoft keeps receiving your mail by default, the people who stay never depend on GINbox, and everyone else gets a GINbox mailbox on the same domain. The admin panel shows the exact routing steps for your domain, with each value ready to copy.
Questions people ask
Can one domain have two email providers?
Yes. A domain’s MX record sends all incoming mail to one provider first, but that provider can pass mail for the people it does not host to the second provider. Google Workspace calls this split delivery and Microsoft 365 an internal relay domain. Each person’s mailbox lives with one provider, and senders see one company.
Can I point MX records to two different providers?
Not usefully. Several MX records are for backup servers of the same system: senders pick by priority, or at random between equal ones, so mail for one person would land at either provider and often bounce. Point the MX at one provider and set up routing between the two.
How do I set up SPF for two email providers?
Publish one SPF record that names both, for example v=spf1 include:_spf.google.com include:_spf.ginbox.net ~all. Never publish two SPF records: receivers then treat SPF as broken. Keep the whole record within SPF’s limit of 10 DNS lookups.
Does DKIM work with two providers?
Yes. Each provider signs with its own DKIM key under its own selector name, so both keys are published side by side as separate TXT records. One DMARC record covers the domain for both.
What do I lose by splitting a domain between two providers?
The two sides do not share calendars, free/busy times, a single address book or shared drives. People still email each other across the sides normally. If your whole team books meetings in one shared calendar every day, keeping everyone on one provider is simpler.
Is a subdomain a simpler alternative?
It is simpler technically: staff.yourcompany.com can have its own MX at a second provider. But those people get different addresses (ravi@staff.yourcompany.com), which customers notice. Split delivery keeps one address format for everyone.
Try it on your own domain
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