How do I link multiple Gmail accounts?

Google offers four tools: sign in to several accounts and switch between them, forward one account into another, add another address under Send mail as, or give someone delegate access. None of them merges the accounts into one inbox with shared search. For that you need a unified email client.

Can I see two Gmail accounts in one inbox?

Not natively on the web. Forwarding sends new mail from one account into the other, but history stays behind and replies come from the receiving account. A unified client such as Slashy connects to both accounts and shows them in one list, with search and labels that span both.

How many Gmail delegates can I add?

Google allows up to 10 delegates on a personal Gmail account and up to 1,000 on a work or school account. Invitations expire after one week, access can take up to 24 hours to start, and delegates cannot be added from the Gmail app.

Does forwarding Gmail copy my old emails?

No. Google's guide says automatic forwarding applies only to new messages and skips spam. To move existing mail you need a different tool, such as a one-time import, since forwarding will not bring over the history already in the account.

How many Gmail accounts can I connect to Slashy?

Up to 10, across Gmail, Google Workspace, Outlook.com and Microsoft 365. In All mode, labels, search and the AI agent run across every account, and replies go out from the account that received the message. Signatures and automations stay separate per account.

BlogIntelligent Inbox

How to Link Multiple Gmail Accounts (2026)

Google has four ways to link multiple Gmail accounts: the switcher, forwarding, Send as and delegation. What each does, where it stops, and what else works.

Harsha Gaddipati

Oct 6, 2026 · 7 min read

TL;DR

Google has four built-in ways to link Gmail accounts: sign in to several at once, forward one into another, send mail from another address you own, or give someone delegate access. None of them gives you a single combined inbox with one search box. For that you need a client that connects to each account directly.

How to Link Multiple Gmail Accounts (2026)

"Link" means different things to different people, and Gmail has a separate feature for each meaning. Some people want to switch between accounts faster. Others want mail from a second address to land in the first, or want to reply as an address they own. A smaller group wants an assistant or a teammate to handle an inbox for them. This guide matches each goal to the Google feature built for it, using Google's own help pages read on October 6, 2026, and says where each one stops. If your second account is on Outlook rather than Gmail, our Gmail and Outlook guide covers that pairing instead.

How do you switch between Gmail accounts without signing out?

Add each account to your browser and use the switcher. Google's multiple accounts page says "if you have more than one Google Account, you can sign in to multiple accounts at once. That way, you can switch between accounts without signing out and back in again." On a computer, you select your profile picture and choose Add account.

This is the lightest-weight option and the right one if you only check the second account now and then. It links nothing: the accounts stay separate, each in its own tab, with its own search and its own notifications. One quirk from the same page: when several accounts are active, Google may apply settings from your default account, which is usually the one you signed in with first.

Can you forward one Gmail account into another?

Yes, and it is the closest thing to a combined inbox that Google still offers on the web. Per Google's forwarding guide, you open Settings, go to the Forwarding and POP/IMAP tab, add a forwarding address, confirm it through the link Google sends to that address, then choose "Forward a copy of incoming mail to."

Two limits matter. It forwards new mail only, not the history already in the account, and it skips spam. You can also forward selectively by creating a filter with the "Forward it" action, which suits a case like sending only invoices to a bookkeeping address. The cost is that replies come from the receiving account unless you also set up Send as, which has its own limits.

Can you send from another address in Gmail?

For addresses you own on Google, yes. Google's Send mail as page walks through it: open Settings, then Accounts and Import, add another email address under "Send mail as," verify it through the confirmation email, and pick it from the From line when you write. Gmail allows up to 99 addresses.

The part to watch is the date. The same page says that starting January 2027, Gmail will no longer support Send as for third-party addresses such as @yahoo.com or @outlook.com. Google Workspace aliases and other Gmail addresses you own are not affected, so linking two Gmail accounts this way keeps working.

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What about pulling other accounts into Gmail?

Gmail used to check other accounts over POP, up to five addresses, and Google's reading mail from other accounts page still describes it. But Google's page on Gmailify and POP changes says the feature no longer supports new users after the first quarter of 2026 and stops for existing users in January 2027. Google recommends forwarding for web users. If your plan was to link accounts this way, forwarding is the replacement, and the multiple accounts guide covers the full set of options.

How does Gmail delegation work?

Delegation is for handing an inbox to another person, such as an assistant, rather than combining your own. Google's delegation page says delegates can "read, send, and delete emails in your account for you," and messages they send show their address.

The limits are specific. Personal Gmail accounts can have up to 10 delegates, and work or school accounts up to 1,000. Invitations expire after one week and access can take up to 24 hours to activate. Delegates cannot use Gemini or Smart Compose in your account, cannot be added from the Gmail app, and you cannot delegate to an alias. Treat it as access control, not a way to see two of your own accounts at once.

When is a unified client the better answer?

When both accounts get real mail every day and you want to search, triage and reply across them without switching. A client that connects to each Gmail account directly gives you one list, one search and one set of labels. We compare seven of them in the best unified inbox apps for multiple email accounts.

Slashy is one, and we build it. According to the multi-account help page, you connect another Gmail account under Settings, Account, Connected Accounts, then use Alt+1, Alt+2 and so on to switch, or Alt+0 for All mode, which interleaves every account by date. In All mode, importance labels, search, AI memories and the AI agent span every account, each thread carries a colored badge for the inbox that received it, and replies automatically use the receiving account. Signatures, calendars, contacts and automations stay per account. The agent can answer a question like "did anyone from Sequoia email either of my accounts this week?" because it searches across all of them.

"After launch, email exploded. 10+ meetings daily, 50 unread by end of day. Slashy's how I make sense of it all."

Sid, Founder of Clodo

Slashy Professional is $30 per user per month or $25 billed annually, with a 7-day trial that needs a card. The honest comparison is cost against attention: switching tabs is free, but it taxes every check.

What to choose if

You check the second account occasionally: the browser account switcher.
You want a quiet account's mail to land in your main one: forwarding, with a filter if you only want some of it.
You reply as another address you own on Google: Send as, which keeps working for Gmail and Workspace addresses.
An assistant or teammate needs access to your inbox: delegation.
Two or more accounts each get daily mail and you want one view: a unified client.

Frequently asked questions

Have more questions? Visit our Help Center.

Last updated: October 6, 2026

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