bbottema/simple-java-mail

Health v2 · maintenance only

Adoption not part of the score

1290 stars · 272 forks observed · 2026-08-28

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

Simple Java Mail is a Java library that wraps Jakarta Mail with a fluent builder API for composing and sending well-formed MIME emails. It adds DKIM, S/MIME, OAuth2, proxies, batch sending, validation, conversion, and Spring support on top of standard SMTP transport.

Use cases

• send emails from a java application
• send html emails with attachments in java
• sign emails with dkim or smime
• send email through an authenticated socks proxy
• send emails asynchronously or in batches
• convert between email formats like EML, Outlook MSG and MIME
• validate email addresses before sending
• send email with oauth2 authentication

When to choose

• you want a simple fluent API instead of raw Jakarta Mail Session and MimeMessage code
• you need DKIM, S/MIME, OAuth2, or proxy support for SMTP delivery
• you need email format conversion (EML, Outlook MSG, MIME)
• you want batch, pooled, or clustered SMTP sending from Java

When to avoid

• you need a full email server or mailbox/IMAP client rather than an SMTP sending library
• you are not on the JVM
• you only need a hosted email API client like SendGrid or Mailgun

Facets

library · maturity stable

email http-client cli sdk email developer-tools backend apis jvm cross-platform cli jakarta-mail smtp-client fluent-api dkim smime oauth2 spring-support email-conversion batch-sending

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