@misc{rfc4096,
    series =    {Request for Comments},
    number =    4096,
    howpublished =  {RFC 4096},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4096},
    url =       {https://www.rfc-editor.org/info/rfc4096},
    author =    {Carl Malamud},
    title =     {{Policy-Mandated Labels Such as "Adv:" in Email Subject Headers Considered Ineffective At Best}},
    pagetotal = 14,
    year =      2005,
    month =     may,
    abstract =  {This memo discusses policies that require certain labels to be inserted in the "Subject:" header of a mail message. Such policies are difficult to specify accurately while remaining compliant with key RFCs and are likely to be ineffective at best. This memo discusses an alternate, \textbackslash{}\%standards-compliant approach that is significantly simpler to specify and is somewhat less likely to be ineffective. This memo provides information for the Internet community.},
}