Version v1.2.4 

June 2026

Highlights

• MIME filename handling updates
  • Added `MimeFilenameSanitizer` to make MIME filename sanitization fail-safe and observable — detects MIME containers by Content-Type, derives fallback-name extensions from the part's Content-Type, and keeps scanning sibling parts when a filename probe fails.
  • Logs full stack traces in sanitizer fallbacks;  logs `SEG_FILENAME_REWRITE_FAILED` at ERROR for confirmed drops.
• Attachment handling updates
  • Skip empty (0-byte) attachments — including un-named ones — quietly and still send the email. Added `segTransactionId` to the skip log for traceability.
• Version telemetry
  • SEG now reports its version for telemetry; Java SDK bumped to 3.1.13.
• Support for Log4J
  • Logger can be enabled/disabled via the `SYSLOG_HOST` setting; errors are not logged when `SYSLOG_HOST` is unconfigured.
• Mandatory DMARC enforcement (outbound)
  • The `enforceDmarc` opt-out was removed — the control can no longer be toggled off; legitimate senders without DMARC must be allow-listed via `TRUSTED_SOURCES`.

Version 1.2.3

November, 2025

Highlights

• Configurable attachment notice text
  • Attachment notice text is now driven by a `simpleAttachmentNoticeTemplate` variable instead of being hardcoded.
• `includeToRecipients` inbound param
  • New inbound parameter to include the original To recipients.

Version 1.2.2

September, 2025

Highlights

• Sender always added as recipient
  • SEG now always adds the package owner as a recipient, and adds a configurable `includeCcRecipients` option for inbound mail.