SMTP-backed mail client for Feather Mail using SwiftNIO.

• SMTP delivery over SwiftNIO
• Raw MIME encoding via Feather Mail
• Supports text, HTML, and attachments
• Optional auth and STARTTLS

• Swift 6.3+
• Platforms:
  • Linux
  • macOS 15+
  • iOS 18+
  • tvOS 18+
  • watchOS 11+
  • visionOS 2+

Use Swift Package Manager; add the dependency to your Package.swift file:

.package(url: "https://github.com/feather-framework/feather-mail-smtp", exact: "1.0.0-rc.3"),

Then add FeatherMailSMTP to your target dependencies:

.product(name: "FeatherMailSMTP", package: "feather-mail-smtp"),

API documentation is available at the following link.

The package uses Logger.current from swift-log for SMTP transport logging. Use withLogger to scope the logger when creating MailClientSMTP; the transport captures the current logger during initialization.

• SwiftNIO SMTP
• Feather Mail
• Feather Mail SES

• Build: swift build
• Test:
  • local: make test
  • using Docker: make docker-test
• Format: make format
• Check: make check

Pull requests are welcome. Please keep changes focused and include tests for new logic.