SMIMEA Milter
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README.md

smilla

smilla is a SMIMEA aware milter.

It implements draft-ietf-dane-smime as specified by the IETF DANE WG.

smilla is written in Python. It queries the SMIMEA-Record (Record-Type 53) in the DNS zone of the email recipient for an x509 certificate. If such a record is found, it will encrypt the mail using the fetched certificate.

The SMIMEA record for the x509 certificate must be created with SMIMEA options "3 0 0"

  • Certificate Usage 3 = DANE-EE (Domain-issued certificate)
  • Selector 0 = Cert (Full certificate)
  • Matching Type 0 = Full (No hash used)

smilla is a joined effort between sys4 and Posteo.de.