Gmail and Outlook in One Inbox: What Works

You can put Gmail and Outlook in one inbox, but the two routes people have used for years both changed in 2026. Google is retiring the Gmail setting that pulled an Outlook mailbox in, and Microsoft has retired the password based authentication that let simple clients reach a Microsoft mailbox. What still works reliably today is a client that signs in to both through Google and Microsoft, which in practice means Outlook itself, Thunderbird, Spark or Apple Mail. Everything else is a workaround with a caveat, and this walks through each one honestly, including the case where the honest answer is that we are not the tool for it.

This question used to have a boring answer. It does not anymore, because both companies moved in opposite directions in the same eighteen months, and most of the guides still online were written before either change.

Can you combine Gmail and Outlook into one inbox?

Yes, three different ways: pull the Outlook mail into Gmail, add the Gmail account to Outlook, or connect both to a third client that holds them together. All three genuinely work for somebody. Which one is right for you comes down to which mailbox you actually live in, and whether either of your accounts is a managed work account, because that single fact rules out more options than anything else.

Worth naming the constraint up front. Both Gmail and Outlook.com speak IMAP, an open standard designed in 1986 precisely so that any client could read any mailbox. Email is now one of the few places in a business stack where two systems that both implement the same open protocol still will not reliably talk to each other, because the fight has moved from the protocol to the authentication layer. Elsewhere you can usually just connect the two systems with an integration layer and move on. With mail, the provider decides.

Route 1: pull your Outlook mail into Gmail (this one is closing)

For years the tidiest answer was to let Gmail do the collecting. In Gmail you went to Settings, Accounts and Import, then Check mail from other accounts, added the Outlook.com address, and Gmail fetched the messages over POP and dropped them into your Gmail inbox. Gmailify went a step further and applied Gmail's spam filtering and categories to the imported mail.

Google is retiring both. According to Google's own support documentation, the feature stopped accepting new users after the first quarter of 2026, and existing users can keep using it only until January 2027. Messages already synced stay in Gmail, but new mail will no longer be fetched.

So if you set this up in 2021 and it is humming along right now, nothing is broken today. You have a working setup with an expiry date on it. If you are only starting now, the option is already gone from your settings, which is why a lot of people are searching for this in the first place.

Google's recommended replacement is to set up automatic forwarding at the other provider instead. That works in the narrow sense that the messages reach you. It also throws away most of what made the original feature useful, which is worth being specific about.

• Forwarded mail carries your own address on the envelope, so you can no longer tell which of your addresses a sender actually wrote to.
• Replies go out as your Gmail address unless you separately configure send as, which means clients see a different address than the one they contacted.
• Everything lands in one undifferentiated pile with no per mailbox boundary, so filters that depended on the destination address stop making sense.
• It is one directional. Archiving in Gmail does nothing to the copy sitting in the Outlook mailbox, so the original account quietly fills up.

For a personal address you barely use, forwarding is fine. For a business address, losing the ability to tell which mailbox a message arrived on is usually a bigger cost than the inconvenience it solves.

Route 2: add your Gmail account to Outlook

The reverse direction is in better shape, and if Outlook is where you already spend your day this is the least disruptive answer.

In classic Outlook for Windows, File, Add Account, then type the Gmail address. Outlook hands you to a Google sign in window, you approve access, and the account appears in the folder list. You can also still enter the server details manually if you prefer, using imap.gmail.com on port 993 with SSL and smtp.gmail.com on port 465, authenticating with an app password rather than your normal Google password. Both paths work.

In new Outlook, adding a Google account is a supported, advertised feature and goes through the same Google sign in. What new Outlook does not give you is the manual route: it does not expose POP, IMAP and SMTP server fields the way classic Outlook does, and POP3 support was dropped entirely. If the mailbox you want to add is not Google or Microsoft, that limitation matters a great deal, and it is one of the main reasons people look for an Outlook alternative.

One thing to check before committing: Outlook shows each account with its own folder tree by default. If you want a genuinely merged view rather than two trees you click between, you need to build a Search Folder covering both accounts, or switch on the unified inbox behavior your Outlook version offers. That step catches people out, since adding the account and merging the view are two separate jobs.

Classic Outlook is supported until at least 2029, so this route has a longer runway than the Gmail one. Microsoft has committed to at least twelve months notice before new Outlook becomes the default and another twelve before switching back becomes impossible.

Route 3: connect both to a third client

The third option is to stop asking either provider to host the other and use a client that treats both as equals. Thunderbird, Spark and Apple Mail all do this, sign in to Google and Microsoft properly, and give you a merged view. Thunderbird calls it Unified Folders, Apple Mail calls it All Inboxes.

This is the route that survives provider policy changes best, because you are not depending on Google to keep a fetching feature alive or on Microsoft to keep supporting a login method. You are just using two accounts in one program, which is what mail clients have always been for.

Here is the honest version of where our own product sits in that list. Inboxes connects mailboxes over IMAP with an app password, and holds every Gmail address plus Yahoo, AOL, iCloud, Zoho, Fastmail and any company domain in one list with a model sorting each message as it arrives. On the Gmail half of this question it does the job well, which is the case we make on the email client for Gmail page. On the Microsoft half it does not, and pretending otherwise would waste your time.

Why can't my email client connect to Outlook anymore?

Because Microsoft removed the login method it was using. Microsoft finished retiring basic authentication for Exchange Online in April 2026, so a managed Microsoft 365 work or school mailbox can no longer be reached with just a username and password over IMAP. Microsoft has also stated it will fully remove support for basic authentication from Outlook.com and rely only on OAuth, which means personal Outlook.com and Hotmail addresses should be treated as at risk rather than safe. Accounts created in the last year or two frequently ship with authenticated SMTP already disabled and no toggle to turn it back on.

That is a security improvement and it is not a mistake on Microsoft's part. It does mean that any client which only knows how to send a password, ours included, has effectively been shut out of Microsoft mail. Clients that implement Microsoft's OAuth flow are unaffected.

Google has not made the equivalent move. App passwords still exist for Gmail, they still require 2-Step Verification on the account, and Google has announced no plan to remove IMAP access. The exceptions are narrower: no app passwords for accounts secured only by a security key, none on Advanced Protection, and often none on managed work or school Google accounts, since that is an administrator setting. This is the practical difference between the two providers right now, and it is why an IMAP client remains a perfectly good answer for Gmail and a dead end for Microsoft.

Which route should you pick?

Is it better to use Gmail or Outlook?

For consolidating other mailboxes, Outlook is now the stronger of the two, which is a reversal of where things stood a few years ago. Outlook adds Google accounts cleanly and keeps each mailbox distinct, while Gmail's ability to absorb outside accounts is being switched off. If your only goal is one place to read everything, Outlook currently gets you further. The wider comparison of the two services, covering storage, search, spam filtering and cost, is in the Outlook versus Gmail breakdown.

Can I use one app for Gmail, Outlook and my work domain?

Only if the app implements Microsoft's OAuth. That is the test that decides it. A client that speaks IMAP with a password will handle Gmail, Yahoo, iCloud, Zoho, Fastmail and your company domain without complaint, and will fail on the Microsoft account. Thunderbird, Spark, Apple Mail and Outlook itself implement both sign in flows and can therefore hold all three.

If your mail is spread across Google and a company domain but has no Microsoft account in it, the IMAP route is simpler and there is no reason to run Outlook for it. The moment a managed Microsoft mailbox enters the picture, the shortlist gets much shorter.

What happens to my mail if I switch clients?

Nothing, provided you connect over IMAP or a provider sign in rather than POP. IMAP leaves every message on the provider's server and shows you a synchronized view of it, so connecting a new client downloads nothing permanently and removes nothing. Disconnect it and the mailbox is exactly as it was. POP is the one to be careful with, because a POP client can be configured to download messages and delete the server copy, which is how people lose mail during a migration.

This is also why trying a client costs you very little. Connect an account, use it for a week, and if it is wrong for you the mail is untouched on Google's or Microsoft's servers the whole time.

The short version

Gmail is closing the door that let it collect other mailboxes, and Microsoft has closed the door that let simple clients reach its mail. The overlap of what still works is narrower than it was: sign in properly to both providers, or accept forwarding and its costs. If your mail is Gmail plus almost anything other than Microsoft, connecting everything to one IMAP client is still the cleanest answer available, and it does not depend on either company keeping a feature alive.