@misc{rfc3459,
    series =    {Request for Comments},
    number =    3459,
    howpublished =  {RFC 3459},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC3459},
    url =       {https://www.rfc-editor.org/info/rfc3459},
    author =    {Eric Burger},
    title =     {{Critical Content Multi-purpose Internet Mail Extensions (MIME) Parameter}},
    pagetotal = 24,
    year =      2003,
    month =     jan,
    abstract =  {This document describes the use of a mechanism for identifying body parts that a sender deems critical in a multi-part Internet mail message. The mechanism described is a parameter to Content-Disposition, as described by RFC 3204. By knowing what parts of a message the sender deems critical, a content gateway can intelligently handle multi-part messages when providing gateway services to systems of lesser capability. Critical content can help a content gateway to decide what parts to forward. It can indicate how hard a gateway should try to deliver a body part. It can help the gateway to pick body parts that are safe to silently delete when a system of lesser capability receives a message. In addition, critical content can help the gateway chose the notification strategy for the receiving system. Likewise, if the sender expects the destination to do some processing on a body part, critical content allows the sender to mark body parts that the receiver must process. {[}STANDARDS-TRACK{]}},
}