LSend: A Fluent API That Simplifies Salesforce Apex Email Sending

Feb 24, 2026

LSend: A Fluent API That Simplifies Salesforce Apex Email Sending

Feb 24, 2026

Sending emails in Salesforce Apex using the native Messaging class often results in verbose, repetitive boilerplate. Configuration takes multiple lines, readability suffers, and maintaining email logic becomes harder over time.

LSend is an open source fluent email API that dramatically simplifies how developers send emails from Apex. With clean method chaining and built in support for templates, attachments, and ContentVersion records, LSend makes email logic expressive, readable, and maintainable.

🔎 Why LSend?

Traditional Apex email setup usually involves:

  • Multiple object initialisations
  • Repetitive recipient configuration
  • Manual attachment wiring
  • Verbose template rendering

LSend replaces all of this with a clean, expressive fluent chain.

✨ Fluent Email in Apex


LSend.emails()
    .sender('onboarding@salesforce.com')
    .to('user@gmail.com')
    .subject('Hello World')
    .html('<strong>It works!</strong>')
    .send();

This reduces complexity by roughly 70% compared to native Messaging.SingleEmailMessage implementations while making the intent of the code immediately clear.

🔥 Key Features

1️⃣ Multiple Recipients


LSend.emails()
    .sender('Support <support@company.com>')
    .to('customer@example.com')
    .cc('manager@company.com')
    .subject('Your ticket has been received')
    .html('<p>We will respond within 24 hours.</p>')
    .send();

2️⃣ HTML, Text, and Template Support


LSend.emails()
    .sender('noreply@company.com')
    .to('user@example.com')
    .subject('Welcome to Our Platform!')
    .staticResource('WelcomeEmail', new Map<String, String>{
        'name' => 'John',
        'company' => 'Acme Inc'
    })
    .send();

3️⃣ Attachments and ContentVersion Integration


Blob pdfContent = PageReference.getContent();

LSend.emails()
    .sender('billing@company.com')
    .to('customer@example.com')
    .subject('Invoice #12345')
    .html('<p>Your invoice is attached.</p>')
    .attach('invoice.pdf', pdfContent)
    .attachContentVersions(contentVersionIds)
    .send();

LSend works seamlessly with Salesforce ContentVersion and native email functionality.

⚙️ Installation

Deploy the following classes into your org from:

force-app/main/default/classes

  • LSend.cls
  • EmailBuilder.cls
  • EmailAttachment.cls
  • EmailResult.cls
  • EmailException.cls

sf project deploy start --source-dir force-app/main/default/classes

⚠️ Important Considerations

UTF-8 Encoding


System.StringException: BLOB is not a valid UTF-8 string

Governor Limits

  • Up to 5,000 emails per day depending on edition
  • Maximum of 150 recipients per email
  • Total attachment size capped at 25 MB per email

💡 Why This Matters for Salesforce Developers

  • Faster development
  • Easier maintenance
  • Reduced technical debt
  • Improved readability for teams

LSend modernises Apex email sending while staying fully compatible with Salesforce’s native infrastructure.

🌍 Sources

If you enjoy discovering practical Salesforce developer tools like this, explore more deep dive content, real world patterns, and certification prep at:
👉 https://www.consultantcloud.io/

By Ciarán Fitzgerald