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Send As Alias Gmail Removed? Which Aliases Survive 2027

Updated 2026-10-03 · by Adam Hale

Not every Gmail "Send as" alias is being removed. In January 2027 Gmail drops aliases for third-party addresses, meaning Yahoo, Outlook, iCloud, ISP mailboxes and custom domains that Google doesn't host. It keeps aliases for other Gmail addresses and for Google Workspace. The quick test: if Google hosts the mailbox behind the alias, it survives.

Send as alias removed or kept: the full list

Google's wording is that you "can continue to use 'Send as' for any Google-hosted identities, including other Gmail addresses or aliases associated with your Google Workspace account" (Gmail Help 17101213).

Alias type	Example	After January 2027
Another Gmail address you own	you.work@gmail.com	Keeps working
Workspace user alias	sales@yourcompany.com on your Workspace account	Keeps working
Workspace user alias domain or secondary domain	you@brand2.com, added in the Admin console	Keeps working
Address in a different Workspace organization	you@client.com (Google-hosted)	Probably keeps working: it's Google-hosted, but Google doesn't spell this case out
Yahoo, AOL, AT&T, Outlook.com/Hotmail, iCloud, GMX, ISP	you@yahoo.com	Removed
Custom domain forwarded to Gmail (ImprovMX, Cloudflare Email Routing, registrar)	you@yourname.com via smtp.gmail.com	Removed
Custom domain hosted at Zoho, Fastmail, Migadu or similar	you@yourname.com via their SMTP	Removed
Workspace account sending as an outside domain	staff@partner.org from a Workspace account	Removed (Keio University notice, 2026-08-04)

How to check which aliases you have

Open Gmail on the web and go to Settings, then "See all settings".
Open "Accounts and Import" (on Workspace it may be called "Accounts").
Look at the "Send mail as" list. For each address, ask one question: is the part after the @ either gmail.com or a domain your Workspace admin has added to your organization?
If not, that alias is third-party and will stop working.

Custom domains catch people out. If you set up you@yourname.com years ago by forwarding the domain to Gmail and adding it through smtp.gmail.com, it still counts as third-party. Gmail doesn't host that domain's mailbox.

Gmail alias not working in 2027? Common reasons

It's January 2027 or later, and the alias is third-party. That's the removal working as announced.
You tried to add a new third-party alias in late 2026. Google says that during Q3–Q4 2026 "Gmail may restrict new configurations", and the page adds: "Prior to January 2027, we will restrict new configurations of this feature."
You changed your Google password. Google revokes all app passwords when you do that (Account Help 185833). Any alias using smtp.gmail.com with an app password stops until you update it.
The other provider revoked its app password. Yahoo and AOL app passwords stay valid until you delete them. Apple revokes all app-specific passwords when you change your Apple Account password.
A Workspace alias domain isn't verified yet. The admin must verify domain ownership before aliases at that domain work.

What to do with a removed alias

The right fix depends on what is behind the address:

Yahoo, AOL, AT&T, iCloud, GMX: send through that provider's own SMTP server with an app password. You can do that from a desktop client, from the Gmail app with the account added separately, or with an extension. See send Yahoo mail from Gmail and the SMTP settings table.
Outlook.com/Hotmail: these need Microsoft sign-in (OAuth). See send as Outlook or Hotmail from Gmail.
Custom domain: either make it Google-hosted by adding it to Google Workspace as a user alias domain (Business Starter is $7/user/month on an annual plan), or get your own outbound SMTP. See custom domain with Gmail without Workspace.
Workspace user sending as an outside domain: see Workspace send as external domain.

Other paths that work for any address: Thunderbird with a separate SMTP server per identity (free), the provider's own webmail, or moving to a host such as Fastmail ($60/yr) where all your addresses live in one mailbox.

About tools that promise to restore your aliases

Google warns about "third-party tools or browser extensions that offer to replicate 'Send as' functionality", because "they often require access to your email credentials or OAuth tokens". Any tool that sends as your Yahoo address must log in to Yahoo's SMTP server, so it needs a credential. What differs is where that credential lives and who can see it. Prefer tools that keep it on your device, publish their code and let you run the server part yourself.

How SendAs Relay fits

If your alias survives, keep using Gmail's built-in Send as. You don't need us.

If it's removed, SendAs Relay brings back a From picker in Gmail on the web (desktop) for addresses whose provider offers SMTP with a password or app password: Yahoo, AOL, AT&T, iCloud, GMX, Web.de, Fastmail, paid Zoho plans, Purelymail, Migadu, paid Forward Email and ImprovMX plans, and custom domains on free senders like Brevo or SMTP2GO.

It works in Firefox 140+ and Edge 137+. It isn't in the Chrome Web Store yet and doesn't work in the Gmail mobile apps.
Mail goes out through your provider's SMTP server via a stateless, open-source relay. Gmail doesn't send it.
Credentials stay in your browser. You can deploy your own relay for free. Read security for the details.
Outlook.com/Hotmail and Proton Mail are not supported yet.

Free covers one address. See pricing for more.

Sources

Gmail Help 17101213: third-party account changes (accessed 2026-10-03)
Google Account Help 185833: app passwords (accessed 2026-10-03)
Workspace Help: add a user alias domain or secondary domain (accessed 2026-10-03)
Keio University ITC notice (2026-08-04)
Yahoo Help: app passwords (accessed 2026-10-03)
Apple: app-specific passwords (published 2025-10-08)
Google Workspace pricing (accessed 2026-10-03)