Tired of Debugging SMTP Error Codes? 

The Nylas API abstracts away the complexities of SMTP and IMAP. Sync & send email from your app with just 4 lines of code.


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Say goodbye to SMTP error codes.

The Nylas communications platform allows developers to build a secure, reliable integration that connects their application to every inbox, calendar, and contacts provider in the world.

The Nylas API abstracts away the errors, bugs, and complexities of building integrations directly with SMTP, IMAP, and every other provider.


Integrate with SMTP/IMAP in 4 Lines of Code

import Nylas from 'nylas';   Nylas.config({ appId: APP_ID, appSecret: APP_SECRET, });   var nylas = \Nylas.with(ACCESS_TOKEN);   nylas.threads .count({in:'inbox'}) .then(count => { console.log( `There are ${count} events in your inbox.` ); });
from nylas import APIClient   client = APIClient( APP_ID, APP_SECRET, token, ) threads = \client.threads.where( unread=True, limit=5, )  for thread in threads: print(thread.subject)
require 'nylas'   nylas = Nylas::API.new( app_id: APP_ID, app_secret: APP_SECRET, access_token: ACCESS_TOKEN )   threads = nylas .threads.search("Hello!")   threads.each do |thread| puts thread subject end

No More Hassles with SMTP Error codes

Sending and receiving email seems simple at first - but as your user base grows and the amount of data you're syncing on their behalf increases, the number of issues grows too. The Nylas API abstracts away the issues and complexities you'd normally encounter when syncing and sending email over SMTP. View our docs to see how it works.



Secure. Reliable. Fast.


We Nylas comes with enterprise-grade security features that developers trust. Nylas has achieved the highest security standards in the industry including SOC 2 certification, Privacy Shield certification, and GDPR compliance.

Nylas undergoes regular penetration testing by third party auditors and is ISO 27001 compliant.

We help you by processing inbox data safely and securely, but you always have full control.




“Nylas allowed us to integrate with Office 365, Outlook, Exchange, and IMAP email providers in a scalable way.

The new features we built with the Nylas API help users understand each contact, opportunity, or deal at a glance - and because they don't have to switch to another app to communicate, they can be much more productive and close deals faster.

Nylas made it easy for us to deliver great email features that are also secure, reliable, and scalable.”

Timo Rein
Co-founder and CEO at Pipedrive

Pipedrive is a CRM and sales enablement software that uses Nylas to power their platform with two-way email sync and send. The added features help funnel sales prospects through the process quickly, leading to millions of dollars in revenue.

Ready to Start Building?


How do I get started with the Nylas Email API?

You can create a developer account with Nylas and sync up to 10 email accounts from different users for free using the Nylas Email API here.

Where do I access the Nylas Email API key?

You can access the Email API key directly from your Nylas dashboard. One key unlocks access to any email provider in the world! Exciting, we know.

How do my users activate email sync?

Your users can kick-start full email sync simply by granting Nylas access to their account. Your users will input their credentials and then be redirected back to your application.

What kinds of companies use the Nylas Email API?

Learn how customers in the CRM, ATS, automotive, finance and legal industries, and more use the Nylas Email API on our case studies page.

What language is the Nylas Email API built on?

Python! We love Python at Nylas; it’s reliable and robust, just like our Email API.

How is the Email API secured?

The Nylas Email API encrypts 100% of your data with enterprise-grade security standards. In addition, Nylas is GDPR compliant, SOC 2 compliant, and HIPAA and FINRA ready.

What are the pricing options for the Nylas Email API?

You can sync up to 10 user’s email accounts for free for 30 days. After that, pricing is based on the number of accounts you have synced; you can view our pricing page for more details.

Additional questions about building your email integration?

Check out our comprehensive Getting Started guide.