Email setup · Works. Use the one-click button.

Connect Gmail or Google Workspace to Revnio

For Gmail, the easiest way is the one-click “Connect Gmail” button on the email settings page. You sign in with Google, tick the box that lets Revnio send email for you, and nothing is pasted anywhere. The app password route below is the alternative, and Google itself advises using “Sign in with Google” where an app supports it.

Last checked October 24, 2026. Providers change their menus, so if a button is missing, use the official links at the bottom of this page.

Before you start

  • For the one-click button: a Google account and permission to approve apps. Make sure you tick the box that lets Revnio send email on your behalf. If you leave it unticked, Revnio refuses the connection and asks you to try again.
  • For an app password: 2-Step Verification must be turned on for your Google account.
  • Google’s help says the app-passwords option does not appear if 2-Step Verification is set up only with security keys, if you are signed in with a work, school or other organization account, or if Advanced Protection is on. If that is you, use the one-click button instead.

Step by step

  1. Easiest: open Settings, then Integrations, then Email, and click “Connect Gmail”. Sign in, tick the permission to send email, and you are done.
  2. Alternative with an app password: first turn on 2-Step Verification in your Google Account under Security.
  3. Open myaccount.google.com/apppasswords. Google may ask you to sign in again.
  4. Type “Revnio” as the app name and click Create.
  5. Copy the 16-character password Google shows you. Google shows it only once. Spaces do not matter, Revnio removes them.
  6. In Revnio, open “Any email account”, enter your Gmail address, paste the app password and click “Connect and send me a test email”.

Server settings

Revnio fills these in when it recognizes your provider. Enter them yourself under Advanced settings if it does not.

Serversmtp.gmail.com
Port587 (STARTTLS) or 465 (SSL)
SecuritySTARTTLS or SSL
UsernameYour full Gmail address

If it doesn’t work

  • The app passwords page does not exist or says it is not available. Your account does not meet Google’s requirements (see prerequisites). Use the one-click “Connect Gmail” button instead.
  • Revnio says Gmail rejected the login. Paste the app password you just created, not your normal Google password. Create a new one if you are unsure.
  • It worked before and now fails. Google revokes your app passwords when you change your Google Account password. Create a new app password, or reconnect with the one-click button.
  • Revnio says it needs permission to send email. On Google’s permission screen, tick the box that lets Revnio send email on your behalf, then connect again.

Taking the access back

  • Open myaccount.google.com/apppasswords, find “Revnio” and delete it.
  • If you connected with the one-click button, click Disconnect in Revnio. Revnio then tells Google to end its access and deletes the saved tokens.

Sending limits

Google documents a daily sending limit of 2,000 messages per user for Google Workspace. We could not find an official figure for free Gmail accounts in Google’s own help pages. Revnio stops sending through your mailbox once it has sent this many recovery emails in 24 hours, and sends the rest through Revnio’s own sender so nothing is delayed. These caps are conservative Revnio defaults, not limits set by the provider. For Gmail the cap is 400 a day.

What we could not confirm

We checked this page against the provider’s own help where we could find it. These details we could not confirm from an official source, so check them with your provider:

  • The Gmail SMTP server names and ports come from Revnio’s settings and Google’s usual documentation; We did not re-read Google’s page for them in this pass.
  • We could not find how a Workspace admin controls app passwords, only that the option can be missing for organization accounts.

Official sources

Frequently asked questions

What is an app password?

An app password is a separate, one-purpose password that your email provider creates for a single program. Revnio uses it to send recovery emails from your mailbox, and your real password never goes into Revnio. Most providers require one when two-step verification is on.

Why can’t I just use my normal email password?

Many providers (Google, Yahoo and Apple among them) block outside programs from signing in with your everyday password. They ask for an app password so that you can cancel Revnio’s access later without changing your real password.

Is it safe? What does Revnio do with the password?

Revnio stores the password encrypted and never shows it back to you or to anyone else in the dashboard. Only an admin can connect a mailbox, and disconnecting deletes the stored password. An app password can open your mailbox, so treat it like a password: give it a name you recognize and delete it when you stop using Revnio.

Can I revoke it later?

Yes. Delete the app password with your email provider (each provider’s page shows where) and click Disconnect in Revnio. For the one-click Gmail connection, Disconnect also tells Google to end Revnio’s access.

Which mailbox is used if I connect more than one?

One mailbox per organization. Connecting a new one replaces the old one, and the dashboard asks you to confirm before it does.

Recover failed payments on autopilot

Revnio retries failed payments at the right time and reaches customers by email and WhatsApp until the card is fixed. Works with Stripe, Chargebee and Paddle.

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