wneessen/go-mail

Health v2 · maintenance only

Adoption not part of the score

1471 stars · 108 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

go-mail is a modern, feature-rich Go library for composing and sending email over SMTP. It provides mail composition, encoding, DKIM and S/MIME signing, attachments, templating, and TLS/SMTP auth options with a small dependency footprint built mainly on the Go standard library.

Use cases

• send email from a Go application
• send transactional emails via SMTP in Go
• sign outgoing emails with DKIM or S/MIME
• send emails with attachments and inline images
• send templated HTML emails
• connect to SMTP servers with STARTTLS or implicit TLS
• import and export EML messages programmatically

When to choose

• you need a comprehensive, idiomatic Go email library with secure defaults
• you want DKIM/S/MIME signing, attachments, and templating in one package
• you prefer minimal dependencies built on the Go standard library
• you need fine-grained TLS policies and SMTP auth mechanisms

When to avoid

• you need a full mail server or IMAP/POP3 retrieval - this only sends mail
• you want a hosted email API client (e.g. SendGrid) rather than raw SMTP delivery
• you work outside the Go ecosystem

Facets

library · maturity active

email http-client auth cryptography templating middleware email developer-tools backend apis go cross-platform cli smtp dkim smime starttls mail-composition eml mua rfc5322

Member repositories

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markdown · JSON · MCP: product_card(name="wneessen/go-mail")