Email OAuth made easy

Use IMAP, POP, and SMTP with Gmail or Microsoft 365 — even if your app doesn’t support OAuth

Works with Microsoft 365, Gmail, Outlook, and all other providers
Seamlessly integrate IMAP, POP3, or SMTP auth into any system
Link your CRMs, ERPs, LOB apps, printers, scan to email, and more
No deliverability issues, no message limits
Use our free trial and get started in seconds

Send and receive from any account with every email client

Connect your email now →

★★★★★

Loved by 404 CRM platforms

Trusted to handle 1,248,017+ OAuth logins for email accounts at

and many more

Works With Everything, Everywhere

Total Compatibility

Use your email account with any email client, including ones that don't support OAuth 2.0
Quick and easy setup – link your mailboxes in seconds, and connect unlimited senders or receivers
No servers to maintain, and no mailbox migrations required
Full protocol support: IMAP, POP, SMTP, and all authorization methods

Full Customization

Use our suite of add-ins to unlock custom mail server behaviors to fit your business needs
Enable legacy connection protocols to keep using older mail systems
Link aliases, shared accounts, or delegated mailboxes
Create your own OAuth client configurations – all grant types are supported

Easy Management

Centralized dashboard to manage and monitor all accounts at once
Secure access – stay compliant, and revoke any time. Find out more about our security and compliance
Privacy by design, with encryption at all stages

What Our Users Say

We really appreciate your product and what it is able to do for us.

Thank you so much for your lightning-fast support

Thank you! It works like a dream. I upgraded our subscription.

Auth-Email is a solid option. Reasonable price, no message limits, and you can try it for free.

The only recommendation we will publish for oauth proxy services.

Join our happy customers →

Why OAuth Breaks Email Integrations

Modern email providers like Gmail and Microsoft 365 now require OAuth authentication for security. While this protects accounts, it also breaks many systems that rely on traditional IMAP, POP, or SMTP username / password authentication.

Unfortunately, many tools cannot implement OAuth easily, including older applications, hardware devices, and scripts.

Auth-Email solves this by acting as an OAuth relay. Your application connects using standard IMAP, POP, or SMTP authentication, while Auth-Email securely handles OAuth with the provider.

Who This Is For

Applications

Keep legacy software working with modern email providers that require OAuth authentication.

Devices

Enable scan-to-email for printers and hardware devices that only support username / password SMTP authentication.

Platforms

Connect customer mailboxes using IMAP, POP3, or SMTP without implementing complex authentication flows in your application.

Developers

Use IMAP, POP, or SMTP from scripts, automation tools, monitoring systems, or integrations without building OAuth support.

Supported Platforms

Use Auth-Email to access mail from all of these providers, and more

Microsoft 365

Including Outlook, Office 365, 21Vianet, Exchange Online, Windows Live Mail, Hotmail

Gmail

Including Google Workspace

Yahoo

Including AT&T, Cox, Sky, Rogers and more

Fastmail

AOL / Verizon

Yandex

Link your account →

How It Works

Auth-Email is a mail relay that handles email OAuth for you. Just switch your apps to use Auth-Email’s server, and access your accounts using standard password authentication.

1. Add account

Connect your email account to Auth-Email using secure OAuth 2.0 authentication. We support Gmail, Outlook, 21Vianet, and many more

2. Customize

Set a password. Optionally, configure advanced features like add-ins, legacy connection protocols, and custom OAuth clients

3. Done!

Change your server settings to use auth-email.com

That’s it – you’re all set!

Your account credentials remain securely encrypted, and cannot be accessed by us

Set up your accounts now →

Free Email Tools

Use our free tools to manage your emails and attachments, check your security, or test your connection.

No email signup, and no registration required.

IMAP connection tester

Test your email client’s IMAP connection, and diagnose any problems

POP connection tester

Use our POP3 test server to validate your email apps without affecting real data

SMTP connection tester

Connect to a simulated SMTP server to check your email sending capabilities

EML file importer

Import a saved email file into your Microsoft 365 or Gmail account

EML converter

Convert your EML files into readable plain text or HTML, and view attachments

MIME structure viewer

Explore the components of an email from its text source, or an EML file

Winmail.dat extractor

Extract the contents of winmail.dat, ATT00001.dat, and TNEF files

Tenant ID finder

Find your Microsoft 365 / Entra / Azure tenant ID

Tenant name lookup

Look up an organization from its Microsoft 365 tenant ID

Admin consent URL generator

Find the correct URL to authorize a new OAuth client with your Microsoft 365 organization

Browse tools →

Frequently Asked Questions

What is Auth-Email?

Auth-Email is an OAuth relay that handles all aspects of OAuth authentication for your email accounts, allowing you to use standard password authentication with any email client, app, device, service or script. We proxy your connections transparently so you can forget about OAuth and focus on your email.

How does Auth-Email work?

Auth-Email handles the OAuth step for you. You authorize your accounts in Auth-Email’s dashboard, and then use Auth-Email’s server settings in your email client to access your accounts using a password you choose.

What are some use cases for Auth-Email?

Auth-Email is ideal for:

Accessing email from clients that don’t support OAuth – for example, service desks, CRM platforms, scan to email, printers, and older apps or devices
Using AI agents with email providers that require OAuth authentication
Managing account authorization for multiple email accounts in one place
Accessing the same account from more than one client without managing OAuth separately for each one
Tracking account access and usage

Which email providers are supported?

Auth-Email supports a wide range of email providers, including Gmail, Google Workspace, Microsoft 365, 21Vianet, GCC High, Exchange Online, Outlook, Windows Live Mail, Hotmail, Yahoo, AOL, Yandex, VK Mail, and more.

Enterprise accounts managed by Microsoft 365 or Google Workspace are fully compatible with Auth-Email.

We also support ISP-provided accounts, including AT&T, Cox, Comcast, Sky, Rogers and others managed by Yahoo.

Are legacy devices supported?

Yes – we aim to support all apps and devices that have been hit by the introduction of OAuth for email logins. If your mail client worked before OAuth, it will work with Auth-Email.

What are the setup details for my Auth-Email account

Our support pages have all the details you'll need to set up your accounts (including servers and ports), plus walkthroughs for advanced features like custom OAuth client flows, account delegation, legacy connection protocols, and add-ins to modify mail server behavior.

Is my data secure with Auth-Email?

Yes – we prioritize your security and privacy. When you authorize your account, the access details are securely encrypted with a password you choose. We don’t store your password, and your email account cannot be accessed by us.

Read more about our security and data handling.

Will there be any issues with deliverability?

No! Unlike SMTP forwarding services, Auth-Email uses your email provider’s original servers, so you can rest assured that your messages will reach their destination.

As a bonus, this also means you don’t have to worry about DNS configuration, SPF, DKIM or any of the other complex and error-prone requirements for modern email sending.

Are there any message limits?

No. Unlike other services, Auth-Email does not track or limit the number of messages. All plans come with unlimited messages!

Instead, we give a generous monthly bandwidth allowance for each plan. The Starter plan comes with 1 GB, while the Personal plan has 5 GB. The Pro plan includes 50 GB data per month.

Can I manage multiple email accounts?

Yes, Auth-Email allows you to manage multiple email accounts from a single dashboard (including shared or delegated accounts).

The number of accounts that can be added depends on your plan:

Starter: 1 account
Personal: 5 accounts
Pro: 25 accounts

Is Auth-Email free?

We have a free trial available, with a limited set of features.

If you become a yearly subscriber, you get 4+ months free. Take a look at our pricing page for more details.

The reason we charge for Auth-Email is that it costs money to run. We want to be around for the long term, and charging for the service helps us cover our costs and continue improving for our users. That’s also why we offer such a large discount for yearly subscriptions.

If you like our service, support Auth-Email by becoming a paid user. It ensures we can keep building the features you need while staying here for the long term.

You can cancel at any time via the subscription management page in your account settings.

View more FAQs →