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Streamline your email delivery & custom SMTP infrastructure

Scale your outbound communication by connecting high-deliverability email engines and secure authentication protocols to your CRM. Effortlessly configure API tokens, OAuth 2.0 access, or custom SMTP parameters while maintaining total control over your domain records. Experience real-time event tracking, automated failure diagnostics, and reliable delivery for all your customer touchpoints.

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SMTP delivery highlights: active route, deliverability, throughput, and protocol
Connect secure outbound mail providers

Connect secure outbound mail connections through custom protocols easily

Streamline your email delivery by choosing from a variety of secure connection protocols tailored to your system. Easily configure high-throughput API keys, direct cloud integrations, or traditional outbound SMTP relays with zero complex coding required. Maintain total control over your deliverability rates while keeping your sending domain credentials fully protected.

Select your preferred integration protocol to route outbound emails

Streamline your email delivery by choosing from a variety of secure connection protocols tailored to your system. Easily configure high-throughput API keys, direct cloud integrations, or traditional outbound SMTP relays with zero complex coding required. Maintain total control over your deliverability rates while keeping your sending domain credentials fully protected.

SMTP, HTTP API, and cloud SMTP protocol options

Configure your email connection in minutes

Select an email provider and add a connection
1

Enter a unique name for your connection

Begin by defining a recognizable internal name for your email integration setup inside DoubleScale. This label helps you easily identify and manage this connection later within your account dashboard.

Authenticate domain and IP for SMTP
2

Choose your email delivery service provider

Select your preferred email provider or custom SMTP server from the available interactive integration grid. Pick the exact service that handles your outbound transactional messages to automatically configure protocol parameters.

Complete SMTP configuration
3

Authenticate account credentials & API keys

Enter your provider account details, secret API key, and server region to establish authentication. Save these credentials securely so DoubleScale can safely communicate with your external email server infrastructure.

Monitor SMTP email activity
4

Configure default sender email & name

Set your official sender email address and display name to personalize outgoing messages for recipients. Finalize your settings and save the connection to complete integration and start routing emails.

Fast outbound email dispatcher

Guarantee inbox placement with test dispatches

Safeguard outbound campaigns by sending real-time test emails through your configured providers to evaluate dispatch speeds and server acceptance. Keep messaging workflows running reliably by running instant deliverability checks whenever you update your credentials.

Review complete message history across all connected providers

Gain full visibility into email delivery performance using comprehensive diagnostic logs and status tracking. Identify bounce triggers and inspect detailed server payloads to keep all messages in optimal inbox placement.

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Complete SMTP message history table

Most DoubleScale FAQ’s

Explore common questions to save your time & get started with confidence.

DoubleScale is a complete self-hosted CRM and email marketing automation plugin for WordPress. It combines powerful contact management, sales pipeline tracking, email campaigns, and marketing automation—all within your WordPress dashboard.

Yes, DoubleScale is 100% self-hosted. Your data never leaves your server. Unlike SaaS solutions like Mailchimp or ActiveCampaign, all your contact data, campaigns, and pipeline information stay in your WordPress database, giving you complete ownership and control.

Absolutely not! DoubleScale stores all data in custom database tables separate from your main WordPress database. The admin interface is built as a Single Page Application (SPA) using modern technology, making it incredibly fast and responsive.

No! DoubleScale has no restrictions on the number of contacts you can store or emails you can send. Store unlimited contacts, create unlimited campaigns, and build unlimited sales pipelines without worrying about hitting tier limits or paying success taxes.

Experience effortless workflows designed to support your success

DoubleScale lets you explore how easy it is to manage and grow with one intuitive system, built to keep everything connected and effortless.

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