v0.1.0

First public release of gomailer — an idiomatic, stdlib-first email library for Go.

Highlights

• Transports: SMTP / ESMTP (STARTTLS, AUTH, SMTPUTF8), sendmail, and null.
• Routing: round-robin, failover, and named-transport routing as composable decorators.
• Middleware: BeforeSend (mutate / reject) and AfterSend (observe) hooks around any transport.
• DSN config: build transports from smtp://…, including failover(…) / roundrobin(…) composites.
• Observability: opt-in OpenTelemetry traces & metrics via a separate module.
• Secure by default: verified TLS, cleartext-auth refused, sane timeouts.
• Testable: in-memory recording transport with assertion helpers.

Modules

Multi-module workspace — pull in only what you use:

• github.com/shyim/go-mailer — core
• github.com/shyim/go-mailer/transport/smtp
• github.com/shyim/go-mailer/transport/sendmail
• github.com/shyim/go-mailer/middleware/otelmw

go get github.com/shyim/go-mailer@v0.1.0

Pre-1.0 — the API may still change.