SocketLabs Integrations: Native, Zapier, and API
SocketLabs builds its integration surface the way an infrastructure vendor does, not the way a marketing platform does. The help center Integrations index carries 22 first-party setup guides. Postfix, Sendmail, three generations of Exchange, IIS SMTP, cPanel/Exim, Drupal, MailPoet and a row of desktop mail clients, plus 8 official client SDKs, a WordPress.org plugin with 900+ active installs, and 5 documented API surfaces. It has no marketplace: 0 Zapier apps, and the app listing URL returns a 404.
Against Postmark or SendGrid, SocketLabs publishes fewer SaaS connectors and far more on-premise plumbing, send-connector guides for Exchange 2003 are still live, which tells you which buyer the product is written for. Everything below routes through the relay at smtp.socketlabs.com, the Injection API, or Event Webhooks.
At a glance
Integrations directory
The 25 entries below come from the official Integrations index, the socketlabs GitHub organisation and the product updates log. NATIVE is a SocketLabs-written guide for a third-party product, OFFICIAL is code SocketLabs maintains, API is an endpoint you wire up yourself.
Native setup guides
Official first-party
API & webhooks
Automation
Mail servers and MTAs (6)
Every guide here declares smtp.socketlabs.com as smart host or relayhost on port 587 with SASL auth; the value is that the vendor maintains the version for your MTA. Credential trap: the SMTP password is not the Injection API key, and the wrong one returns 501 5.7.0 - Authentication failed.
Relayhost configuration for forwarding outbound Postfix mail with SASL auth.
Smart-host configuration for relaying Sendmail output without code changes.
Send connector setup for Exchange 2016/2019, with legacy builds also covered.
Sets SocketLabs as smart host on Windows, for apps that speak only local SMTP.
Exim configuration that relays outbound cPanel hosting mail through SocketLabs.
SocketLabs’ on-premise MTA, joined to cloud analytics by its own connector.
CMS and publishing (2)
The WordPress plugin is the only first-party application code outside the SDKs, and the right fix when wp_mail() silently drops transactional mail. The Drupal entry is SMTP configuration, not a plugin.
Reroutes wp_mail() through SocketLabs instead of PHP mail; 900+ installs.
SMTP configuration for routing Drupal registrations, resets and contact forms.
Mail clients and productivity (3)
These exist because the installed base relays human mail, not only application mail. A desktop client on the relay is still bound by the 500-recipient ceiling and the 40MB size cap.
Outgoing-server setup covering current and legacy Outlook builds, plus Outlook for Mac.
Outgoing SMTP setup on macOS, including implicit SSL on port 465.
Routes tenant outbound mail through SocketLabs and into SocketLabs reporting.
Official SDKs (8)
All eight wrap the same Injection API and take a numeric serverId plus an API key. Check maintenance before committing: C# was updated May 2026 and Go February 2026, while Node, PHP, Python, Ruby and PowerShell have been static since 2023–2024. The API Libraries page omits Ruby and PowerShell entirely.
SocketLabs.InjectionApi – the reference implementation for the other seven.
First-party Go client; second-healthiest repo in the org.
Maven or Gradle artifact for the Injection API.
@socketlabs/email; audit its dependency tree before shipping.
socketlabs/injection-api, installed with Composer.
socketlabs-injectionapi on PyPI, version 1.4.4.
Injection API gem, absent from the API Libraries page.
Module for Windows automation and scripting.
Webhooks and inbound (3)
Event Webhooks are how SocketLabs pushes state back, and they substitute for the Zapier connector that does not exist. Auth is a Secret Key inside the payload, not a signature header: compare it, return 200 on match and 401 otherwise. Source IPs are 52.152.150.178 for validation and 142.0.176.0/20 in production.
HTTPS POST notifications for queued, deferred, delivered, failed and complaint events.
First-party extensions that receive, validate and deserialise webhook POSTs for you.
Converts inbound SMTP to a defined JSON blob and POSTs it to your endpoint.
Routing, analytics and automation (3)
Email Relay, launched June 2025 and widened October 2025, keeps SocketLabs analytics and rule automation while delivery happens at SendGrid, SparkPost, Mailgun, generic SMTP or Hurricane. That observability layer is what Infobip named on closing its acquisition on July 9, 2026; nothing has been published since about packaging.
Routes traffic through SendGrid, SparkPost, Mailgun, generic SMTP or Hurricane.
Feeds Spotlight analytics from an existing SparkPost stream without migrating.
No SocketLabs app exists; the listing URL 404s. Bridge with Webhooks by Zapier.
Frequently asked questions
How do I configure the SocketLabs WordPress plugin to send site email?
Install it from the WordPress.org directory, then supply the Injection API credential pair, the numeric serverId and the API key from the control panel, in the plugin settings. It intercepts wp_mail() and routes it through SocketLabs instead of PHP mail(). Verify the sending domain first: an unverified domain is rejected with 554 5.1.0 The Sender's Address Was Not Allowed.
How do I set up Postfix or Sendmail to relay through SocketLabs?
Both use the documented smart-host pattern: in Postfix set relayhost to the relay on port 587 with SASL authentication and the issued credentials in the password map; in Sendmail declare the same host as smart host. The SMTP username is issued, not chosen, in the form server12345. Cap concurrency at 20 connections and about 50 messages each, or you get 421 4.4.5 - Too many connections.
How do I route Microsoft Exchange or IIS SMTP outbound mail through SocketLabs?
Exchange uses a send connector scoped to the address spaces you want relayed, with smart-host routing to SocketLabs and basic authentication over TLS using the issued SMTP credentials; separate walkthroughs cover Exchange 2016/2019, 2010 and 2003. The IIS SMTP Virtual Server does the same from its Delivery tab. Allow outbound traffic to 142.0.176.0/20 rather than pinning an IP.
Does SocketLabs have a Zapier integration?
No. There is no SocketLabs app on Zapier, the listing URL returns a 404 – and none is published for Make or n8n either. That is a real gap if your workflow expects a no-code tile. The substitute is Event Webhooks: point a Webhooks by Zapier catch hook at your account webhook URL to receive delivered, deferred, failed and complaint events as JSON. For sending, use a webhook action against the Injection API.
How do SocketLabs Event Webhooks work and how do I verify they came from SocketLabs?
SocketLabs POSTs JSON to an HTTPS endpoint you register, one payload per event type: queued, deferred, delivered, failed, complaint and tracking events. Verification is by shared secret rather than signature, the payload carries a SecretKey and a ServerId, and your handler compares the key against the one generated in the control panel, returning 200 on match and 401 otherwise. Allow-list 52.152.150.178 and 142.0.176.0/20.
Can SocketLabs receive and parse inbound email into JSON?
Yes. The Inbound Parse service accepts inbound SMTP messages, converts each into a defined JSON structure and POSTs it to a web endpoint you nominate, the usual pattern for reply handling and ticket ingestion. Configuration happens in-app, from the Reports menu on the relevant server. One caveat: SocketLabs does not publish the MX hostname to point a receiving domain at, so treat inbound parse as configurable in-app rather than pre-stageable in DNS.
This review follows our email infrastructure testing methodology. We disclose affiliate relationships in our editorial independence policy.
