IMAP related RFCs

    2177 - IDLE Extension: https://tools.ietf.org/html/rfc2177
    2342 - NAMESPACE Extension: https://tools.ietf.org/html/rfc2342
    2971 - ID Extension: https://tools.ietf.org/html/rfc2971
    3348 - CHILDREN Extension: https://tools.ietf.org/html/rfc3348
    3501 - IMAP 4rev1: https://tools.ietf.org/html/rfc3501
    3502 - MULTIAPPEND Extension: https://tools.ietf.org/html/rfc3502
    3516 - Binary Content Extension: https://tools.ietf.org/html/rfc3516
    3691 - UNSELECT Extension: https://tools.ietf.org/html/rfc3691
    4314 - Access Control List Extension: https://tools.ietf.org/html/rfc4314
    4315 - UIDPLUS Extension: https://tools.ietf.org/html/rfc4315
    4469 - CATENATE Extension: https://tools.ietf.org/html/rfc4469
    4731 - ESEARCH Extension: https://tools.ietf.org/search/rfc4731
    4978 - COMPRESS Extension: https://tools.ietf.org/html/rfc4978
    5032 - WITHIN Search Extension: https://tools.ietf.org/html/rfc5032
    5161 - ENABLE Extension: https://tools.ietf.org/html/rfc5161
    5182 - Last SEARCH Result: https://tools.ietf.org/html/rfc5182
    5228 - Sieve: An Email Filtering Language: https://www.rfc-editor.org/rfc/rfc5228
    5255 - Internationalization: https://tools.ietf.org/html/rfc5255
    5256 - SORT and THREAD Extensions: https://datatracker.ietf.org/doc/html/rfc5256
    5258 - LIST Command Extensions: https://tools.ietf.org/html/rfc5258
    5267 - Contexts for IMAP4 (ESORT and CONTEXT): https://tools.ietf.org/html/rfc5267
    5464 - METADATA Extension: https://tools.ietf.org/html/rfc5464
    5465 - NOTIFY Extension: https://tools.ietf.org/html/rfc5465
    5530 - Response Codes: https://tools.ietf.org/html/rfc5530
    5819 - STATUS Information in Extended LIST: https://tools.ietf.org/html/rfc5819
    5957 - Display-Based Address SORT: https://tools.ietf.org/html/rfc5957
    6154 - LIST Extension for Special-Use Mailboxes: https://tools.ietf.org/html/rfc6154
    6186 - SRV Records for Email Services: https://tools.ietf.org/html/rfc6186
    6203 - Fuzzy Search Extension: https://tools.ietf.org/html/rfc6203
    6851 - MOVE Extension: https://tools.ietf.org/html/rfc6851
    6855 - IMAP Support for UTF-8: https://tools.ietf.org/html/rfc6855
    6858 - IMAP Downgrading for Internationalized Email: https://tools.ietf.org/html/rfc6858
    7162 - CONDSTORE and QRESYNC Extensions: https://tools.ietf.org/html/rfc7162
    7377 - Multimailbox SEARCH Extension: https://tools.ietf.org/html/rfc7377
    7817 - TLS Server Identity Check Procedure for Email-Related Protocols: https://tools.ietf.org/html/rfc7817
    7888 - Non-synchronizing Literals: https://tools.ietf.org/html/rfc7888
