Oracle Cloud Infrastructure Documentation
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TLS Requirements

Oracle maintains strict security policies and only accepts email traffic using Transport Layer Security (TLS). Use of TLS 1.2 is mandatory to send email using Oracle Cloud Infrastructure.

The approved TLS 1.2 ciphers are:

  • TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
  • TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
  • TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  • TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  • TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  • TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  • TLS_RSA_WITH_AES_256_CBC_SHA
  • TLS_RSA_WITH_AES_256_CBC_SHA256

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