Preferred type is application/pkcs7-mime

application/x-pkcs7-certificates

This mimetype is deprecated. You should still support it, but avoid using it to assign new mimetypes.
Instead, please use application/pkcs7-mime

File types

.p7c
.p7m

Also appears as

application/pkcs7-mime
Preferred
application/x-pkcs7-certreqresp
Deprecated

Further reading

  1. IETF - Internet Engineering Task Force (RFC 5273)
  2. PKI Tutorial

Related to

No related mimetypes listed