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Effective URL: https://developer.nylas.com/docs/support/troubleshooting/what-is-nyl/
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YOUR PRIVACY
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privacy and your right to control how we collect, use, and share your personal
data. You change these settings any time.
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API Reference
Nylas API v3 - Administration Nylas API v3 - Email, Calendar, Contacts Nylas API
v2.7 (latest) Nylas API v2.5 Scheduler API Webhooks Integrations - Private Beta
Error Library
Changelog Log In Try Nylas Free
Home
* Getting Started
* What is Nylas?
* Set up your Sandbox
* Connect an account
* Authorize API requests
* Try the APIs
* Resources and tutorials
* Read and create events
* Read and send email
* Nylas v3
* API v3 quickstart
* Features and changes in API v3
* Error types in v3
* Administration APIs ↗
* Email, Calendar & Contacts APIs ↗
* v3 diff view
* Upgrade to API v3
* Upgrade Authentication
* Upgrade Webhooks
* Upgrade Email APIs
* Upgrade Calendar APIs
* Upgrade Contacts APIs
* Email
* Using the Email API
* Send email messages
* Improve email deliverability
* Track email messages
* Signature extraction
* Clean Conversations
* Changes to Email in API v3
* v3 Email scopes
* File attachment media types
* Smart Compose (API v3 only)
* Changes to Threads in v3
* Calendar
* Using the Calendar API
* Using the Events API
* Calendars and Events in v3
* Add conferencing to events
* Schedule recurring events
* Check free/busy info
* Calendar availability
* Group availability and booking
* Calendar scopes
* Virtual calendars
* How to use virtual calendars
* Virtual calendar availability
* Deleted events in v2
* Calendar cookbook
* Contacts
* Using the Contacts API
* v3 Contacts scopes
* Scheduler
* Scheduler Quickstart
* Schedule Editor Set up
* Instant Integration
* Smart Integration
* Creating, Editing, and Scheduling Meetings
* Schedule Editor
* Scheduling Page
* Meeting types
* Scheduler Customization
* Customizing the Schedule Editor
* Customizing the Scheduling Page
* Embedding Scheduler
* Custom Thank You Page
* Automatic Emails
* Localization
* Scheduler Booking Flow Query Parameters
* Scheduler Webhooks
* Scheduler Web Reference
* Troubleshooting Scheduler
* Round Robin Scheduler Behavior
* Handling Scheduler Reauthentication
* Office 365 Event Not Added to Calendar
* Nylas API Docs
* API v3 Docs
* v3 Administration API docs
* v3 Email, Calendar and Contacts API docs
* Metadata
* Errors
* 200-299 Responses
* 400-499 responses
* 500 Response
* Rate limits
* Supported Providers
* Versioning
* Transition to v2.1
* Developer Guide
* Developing with Nylas
* Authentication in v2
* Hosted authentication
* Native authentication
* Authorizing API requests
* Bulk auth with service accounts
* Authentication scopes
* Authentication in v3
* v3 Authentication changes
* Create a Google auth app for v3
* Create an Azure app for v3
* Create grants with OAuth and API key
* Create grants with OAuth and access token
* Create grants with Custom auth
* Create grants with IMAP
* Create grants for Virtual Calendars in v3
* Configure the OAuth login prompt
* Authentication scopes in v3
* Bulk authentication in v3
* Manage accounts in v2
* Account sync states
* Manage grants in v3
* Webhooks
* Changes to webhooks in v3
* Set up webhooks
* Best practices
* Webhook scopes
* Webhook schemas
* Production checklist
* Provider guides
* Google
* Create a Google application
* Google authentication in v2
* Google Workspace Service Accounts
* Google PubSub Message Sync
* Google verification and security assessment guide
* Microsoft
* Email Administrator Guide
* Developers Guide
* Microsoft Authentication
* Enable Microsoft Graph Events permissions
* ⚠️ Microsoft Exchange Online and Basic Authentication
* Create an Azure application
* Upgrade an Azure app to use Graph
* Office365 Service Accounts Setup or Exchange Online
* Suggested Office 365 Settings
* Invite Nylas to Your Azure App
* Admin Approval
* Microsoft Exchange Login
* Testing Exchange Autodiscovery
* Checking for Quarantined EAS Devices
* Gathering Exchange Logs
* Override Sender Display Name
* Microsoft Verification Guide
* IMAP Providers in v3
* iCloud Authentication
* Yahoo authentication
* App Passwords
* Security best practices
* Nylas CLI
* Getting started
* CLI Commands
* Making CLI API Requests
* Testing Webhooks
* Platform
* Data residency
* Change data residency region
* Data retention
* Historical sync and webhook settings
* Error handling and monitoring
* Nylas Postman collection
* Deltas in v2
* Nylas SDKs
* Node.js SDK
* Get started with the Node.js SDK
* Authenticate users with Node.js
* Upgrade Node SDK v5 to v6
* Upgrade Node SDK v6 to v7
* Manage events with Node.js
* Manage contacts with Node.js
* Manage folders and labels with Node.js
* Read messages and threads with Node.js
* Send email messages with Node.js
* Set up local webhook testing
* Python SDK
* Get started with the Python SDK
* Authenticate users
* Upgrade Python SDK v5 to v6
* Manage events
* Manage contacts
* Manage folders and labels
* Read email messages with Python
* Send email messages with Python
* Set up local webhook testing
* Ruby SDK
* Get started with the Ruby SDK
* Upgrade Ruby SDK v5 to v6
* Manage events
* Manage contacts
* Read email messages and threads
* Send email messages with Ruby
* Set up local webhook testing
* Kotlin/Java SDK
* Install the Kotlin/Java SDK
* Upgrade Java SDK to Kotlin/Java v2
* Java SDK
* Java Logging
* Manage contacts
* Organize with folders and labels
* Read emails and threads
* Send email messages with Kotlin/Java
* Set up local webhook testing for the Java SDK
* Nylas Dashboard
* Dashboard v2
* Manage applications in v2
* Support
* Troubleshooting
* Microsoft Troubleshooting
* Microsoft Authentication Troubleshooting
* Nylas Was Unable to Connect to the Exchange Server
* Couldn't Exchange OAuth Code for a Microsoft Refresh Token
* Exchange Autodiscovery Failed
* Incorrect Connection Settings
* Credential Errors Not Related to a Password
* Invalid Password Error
* Status 403
* Unauthorized Error
* How to Detect MDM Issues for EAS
* IMAP Support Turned Off
* ServerError 110
* Server Error Retry Later 111 or 85
* Server Does Not Support SSL
* The Mail Server Experienced a Temporary Error
* Message Delivery Submission Failed
* Unexpected Folders and Calendars
* Dealing with Spam
* Email Sent Not Received
* Same Server Error
* Get Header Contents
* Immediate Webhook Notification
* Missing Notifications for Read Messages
* Passwords and Character Encoding
* Sent Mail Not Syncing
* Customer changed password
* UIDVALIDITY
* Nylas Link That Directs to Spam
* What is nyl.as
* Billing
* GDPR
* Version lifecycle
* What's New
* Product release notes
* SDK changelogs
* API Reference
* Nylas API 2.7 (latest)
* Nylas API (v2.5)
* Scheduler API
* Developer Tools
* Changelog
* Support
* Contacting Support
* Troubleshooting
Home
* Getting Started
* What is Nylas?
* Set up your Sandbox
* Connect an account
* Authorize API requests
* Try the APIs
* Resources and tutorials
* Read and create events
* Read and send email
* Nylas v3
* API v3 quickstart
* Features and changes in API v3
* Error types in v3
* Administration APIs ↗
* Email, Calendar & Contacts APIs ↗
* v3 diff view
* Upgrade to API v3
* Upgrade Authentication
* Upgrade Webhooks
* Upgrade Email APIs
* Upgrade Calendar APIs
* Upgrade Contacts APIs
* Email
* Using the Email API
* Send email messages
* Improve email deliverability
* Track email messages
* Signature extraction
* Clean Conversations
* Changes to Email in API v3
* v3 Email scopes
* File attachment media types
* Smart Compose (API v3 only)
* Changes to Threads in v3
* Calendar
* Using the Calendar API
* Using the Events API
* Calendars and Events in v3
* Add conferencing to events
* Schedule recurring events
* Check free/busy info
* Calendar availability
* Group availability and booking
* Calendar scopes
* Virtual calendars
* How to use virtual calendars
* Virtual calendar availability
* Deleted events in v2
* Calendar cookbook
* Contacts
* Using the Contacts API
* v3 Contacts scopes
* Scheduler
* Scheduler Quickstart
* Schedule Editor Set up
* Instant Integration
* Smart Integration
* Creating, Editing, and Scheduling Meetings
* Schedule Editor
* Scheduling Page
* Meeting types
* Scheduler Customization
* Customizing the Schedule Editor
* Customizing the Scheduling Page
* Embedding Scheduler
* Custom Thank You Page
* Automatic Emails
* Localization
* Scheduler Booking Flow Query Parameters
* Scheduler Webhooks
* Scheduler Web Reference
* Troubleshooting Scheduler
* Round Robin Scheduler Behavior
* Handling Scheduler Reauthentication
* Office 365 Event Not Added to Calendar
* Nylas API Docs
* API v3 Docs
* v3 Administration API docs
* v3 Email, Calendar and Contacts API docs
* Metadata
* Errors
* 200-299 Responses
* 400-499 responses
* 500 Response
* Rate limits
* Supported Providers
* Versioning
* Transition to v2.1
* Developer Guide
* Developing with Nylas
* Authentication in v2
* Hosted authentication
* Native authentication
* Authorizing API requests
* Bulk auth with service accounts
* Authentication scopes
* Authentication in v3
* v3 Authentication changes
* Create a Google auth app for v3
* Create an Azure app for v3
* Create grants with OAuth and API key
* Create grants with OAuth and access token
* Create grants with Custom auth
* Create grants with IMAP
* Create grants for Virtual Calendars in v3
* Configure the OAuth login prompt
* Authentication scopes in v3
* Bulk authentication in v3
* Manage accounts in v2
* Account sync states
* Manage grants in v3
* Webhooks
* Changes to webhooks in v3
* Set up webhooks
* Best practices
* Webhook scopes
* Webhook schemas
* Production checklist
* Provider guides
* Google
* Create a Google application
* Google authentication in v2
* Google Workspace Service Accounts
* Google PubSub Message Sync
* Google verification and security assessment guide
* Microsoft
* Email Administrator Guide
* Developers Guide
* Microsoft Authentication
* Enable Microsoft Graph Events permissions
* ⚠️ Microsoft Exchange Online and Basic Authentication
* Create an Azure application
* Upgrade an Azure app to use Graph
* Office365 Service Accounts Setup or Exchange Online
* Suggested Office 365 Settings
* Invite Nylas to Your Azure App
* Admin Approval
* Microsoft Exchange Login
* Testing Exchange Autodiscovery
* Checking for Quarantined EAS Devices
* Gathering Exchange Logs
* Override Sender Display Name
* Microsoft Verification Guide
* IMAP Providers in v3
* iCloud Authentication
* Yahoo authentication
* App Passwords
* Security best practices
* Nylas CLI
* Getting started
* CLI Commands
* Making CLI API Requests
* Testing Webhooks
* Platform
* Data residency
* Change data residency region
* Data retention
* Historical sync and webhook settings
* Error handling and monitoring
* Nylas Postman collection
* Deltas in v2
* Nylas SDKs
* Node.js SDK
* Get started with the Node.js SDK
* Authenticate users with Node.js
* Upgrade Node SDK v5 to v6
* Upgrade Node SDK v6 to v7
* Manage events with Node.js
* Manage contacts with Node.js
* Manage folders and labels with Node.js
* Read messages and threads with Node.js
* Send email messages with Node.js
* Set up local webhook testing
* Python SDK
* Get started with the Python SDK
* Authenticate users
* Upgrade Python SDK v5 to v6
* Manage events
* Manage contacts
* Manage folders and labels
* Read email messages with Python
* Send email messages with Python
* Set up local webhook testing
* Ruby SDK
* Get started with the Ruby SDK
* Upgrade Ruby SDK v5 to v6
* Manage events
* Manage contacts
* Read email messages and threads
* Send email messages with Ruby
* Set up local webhook testing
* Kotlin/Java SDK
* Install the Kotlin/Java SDK
* Upgrade Java SDK to Kotlin/Java v2
* Java SDK
* Java Logging
* Manage contacts
* Organize with folders and labels
* Read emails and threads
* Send email messages with Kotlin/Java
* Set up local webhook testing for the Java SDK
* Nylas Dashboard
* Dashboard v2
* Manage applications in v2
* Support
* Troubleshooting
* Microsoft Troubleshooting
* Microsoft Authentication Troubleshooting
* Nylas Was Unable to Connect to the Exchange Server
* Couldn't Exchange OAuth Code for a Microsoft Refresh Token
* Exchange Autodiscovery Failed
* Incorrect Connection Settings
* Credential Errors Not Related to a Password
* Invalid Password Error
* Status 403
* Unauthorized Error
* How to Detect MDM Issues for EAS
* IMAP Support Turned Off
* ServerError 110
* Server Error Retry Later 111 or 85
* Server Does Not Support SSL
* The Mail Server Experienced a Temporary Error
* Message Delivery Submission Failed
* Unexpected Folders and Calendars
* Dealing with Spam
* Email Sent Not Received
* Same Server Error
* Get Header Contents
* Immediate Webhook Notification
* Missing Notifications for Read Messages
* Passwords and Character Encoding
* Sent Mail Not Syncing
* Customer changed password
* UIDVALIDITY
* Nylas Link That Directs to Spam
* What is nyl.as
* Billing
* GDPR
* Version lifecycle
* What's New
* Product release notes
* SDK changelogs
* API v2 124
* API v3 102
* Article 113
* Troubleshooting 48
* Tutorial 87
Only show these results:
* Authentication 68
* Developer Tools 70
* Events 10
* Google 22
* Java 10
* Microsoft 53
* Node 11
* Python 10
* Sync 13
* Webhooks 15
1. ZOOM
Connect accounts to Zoom to add meeting details
You can connect your accounts to Zoom and take the hassle out of adding
Zoom details to events. Configure events
2. YAHOO ACCOUNT AUTHENTICATION
Learn how to connect Yahoo accounts to Nylas.
Nylas supports two ways to authenticate end users who use Yahoo as their
email provider: using OAuth and Custom auth
3. WHAT'S NEW
Find out about new releases and read changelogs.
Here youll find all of our release notes and changelogs - your one-stop
shop for all things new at Nylas
4. WHAT IS NYLAS?
Read about Nylas architecture and concepts, and learn how Nylas syncs data
and sends email.
The Nylas platform provides an integration layer that makes it easy to
connect and sync email, calendar, and contact data
5. WHAT IS NYL.AS?
What is nyl.as?
You might have come across a link in an email message or on the web that
has https://nyl.as
6. WHAT HAPPENS WHEN A CUSTOMER CHANGES THEIR PASSWORD?
What happens when a customer changes their password?
If a customer changes their password or revokes access to your application
in their settings, Nylas will return a 401
7. WEBHOOKS OVERVIEW
Learn about how Nylas uses webhooks, and how to add them to your
application.
📝 This page discusses both Nylas v2.x and v3. For more information about
the newest version, see the
8. WEBHOOKS
Your application receives information about changes to user accounts and
data through Nylas webhooks.
Your application receives information about changes to user accounts and
data through Nylas webhooks. 🔍 The term webhook can refer
9. WEBHOOKS
Webhooks allow your Nylas application to receive notifications when certain
events occur (for example, when a user receives an email message, Nylas
makes a `POST` request to your URI endpoint). You can specify what events
you want to be notified about in the v2 Nylas Dashboard.
Webhooks allow your Nylas application to receive notifications when certain
events occur (for example, when a user receives an email
10. WEBHOOK SCOPES
Learn about the scopes required for webhook notification triggers in Nylas
API v2.x and v3.
📝 This page discusses both Nylas v2.x and v3. For more information about
the newest version, see the
11. WEBHOOK SCHEMAS
Schema references for each type of webhook notification that Nylas sends.
📝 This page discusses both Nylas v2.x and v3. For more information about
the newest version, see the
12. VIRTUAL CALENDARS OVERVIEW
Learn about virtual calendars and how to integrate them into your Nylas
application.
📝 This page discusses both Nylas v2.x and v3. For more information about
the newest version, see the
13. VIRTUAL CALENDAR AVAILABILITY
Learn how to use the Availability endpoints with virtual calendars.
This page describes how to use the Availability endpoints with virtual
calendars. While Nylas currently doesnt directly support availability or
14. VERSION LIFECYCLE
Version conventions: what do Private preview, Beta, Deprecated and
Maintenance mode mean.
Documentation for several different types of products exist on this site.
You might see articles labeled with Private preview, Beta
15. V3 EMAIL SCOPES
Determine which scopes you need depending on what Email APIs you use.
This page lists the Email APIs and webhooks available in Nylas API v3, and
shows which scopes they require. These
16. V3 CONTACTS SCOPES
Determine which scopes you need depending on which Contacts APIs you use.
This page lists the Contacts API endpoints and webhooks available in Nylas
v3, and shows which scopes they require. These
17. USING THE NYLAS EVENTS API
Get familiar with the Events API by making API calls.
📝 This page discusses both Nylas v2.x and v3. For more information about
the newest version, see the
18. USING THE NYLAS EMAIL API
Familiarize yourself with the Nylas Email API by making API calls.
📝 This page discusses both Nylas v2.x and v3. For more information about
the newest version, see the
19. USING THE NYLAS CONTACTS API
Get familiar with the Nylas Contacts API by making API calls.
📝 This page discusses both Nylas v2.x and v3. For more information about
the newest version, see the
20. USING THE NYLAS CALENDAR API
Get familiar with the Calendar API by making API calls.
📝 This page discusses both Nylas v2.x and v3. For more information about
the newest version, see the
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* Support /
* Troubleshooting /
* What is nyl.as?
WHAT IS NYL.AS?
You might have come across a link in an email message or on the web that has
https://nyl.as/ in it. These links redirect to another page on the internet.
Links to nyl.as are part of the Nylas Email API link tracking feature and
provide a notification when someone clicks on the link. In normal use they are
not malicious or a security issue.
⚠️ If you find a nyl.as link that redirects to spam or other malicious websites,
report it immediately to Nylas Support so we can take immediate action.
The Nylas Communication Platform allows developers to quickly build features
that connect to every email inbox, calendar, and contacts list in the world.
Nylas provides an integration that can be completed in days, pre-built security
and compliance features, and uptime guarantees for paid accounts. The Nylas
communication platform is secure, reliable, and easy to use and maintain.
NYL.AS ERRORS ON OLDER DEVICES
Some devices might receive errors if they access nyl.as links. This is because
they don't support the Let's Encrypt new root certificate. You can review a list
of devices that support the new certificate at Let's Encrypt's Certificate
Compatibility page.
WHAT IS NYL.AS?
1. Nyl.as errors on older devices
Status Support Troubleshooting Trust Center Send feedback! Blog Changelog
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