@misc{rfc5233,
    series =    {Request for Comments},
    number =    5233,
    howpublished =  {RFC 5233},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC5233},
    url =       {https://www.rfc-editor.org/info/rfc5233},
    author =    {Kenneth Murchison},
    title =     {{Sieve Email Filtering: Subaddress Extension}},
    pagetotal = 7,
    year =      2008,
    month =     jan,
    abstract =  {On email systems that allow for 'subaddressing' or 'detailed addressing' (e.g., "ken+sieve@example.org"), it is sometimes desirable to make comparisons against these sub-parts of addresses. This document defines an extension to the Sieve Email Filtering Language that allows users to compare against the user and detail sub-parts of an address. {[}STANDARDS-TRACK{]}},
}