…ncluding but not limited to IMAP, POP, and HTTP. message context As defined in [RFC3458]. UIDVALIDITY As defined in IMAP4rev1 [RFC3501]. UIDVALIDITY is critical to the correct operation of a caching mail client. When it changes, the client MUST flush its cache. It's particularly …

…cluding but not limited to IMAP, POP, and HTTP. message context As defined in [ RFC3458 ]. UIDVALIDITY As defined in IMAP4rev1 [ RFC3501 ]. UIDVALIDITY is critical to the correct operation of a caching mail client. When it changes, the client MUST flush its cache. It's particular…

…cluding but not limited to IMAP, POP, and HTTP. message context As defined in [ RFC3458 ]. UIDVALIDITY As defined in IMAP4rev1 [ RFC3501 ]. UIDVALIDITY is critical to the correct operation of a caching mail client. When it changes, the client MUST flush its cache. It's particular…

…uthor to its Recipients. A message can be explicitly labeled as to its nature [ RFC3458 ]. A message comprises a transit-handling envelope and the message content. The envelope contains information used by the MHS. The content is divided into a structured header and the body. The…