Dan Oetting wrote:
On Dec 9, 2009, at 3:24 PM, John Levine wrote:
the POP spec says quite clearly
that once the message is deleted from the server, the UIDL is no
longer valid. It'd be a significant change to POP.
This is the same as with the IMAP server. If a message is deleted from
the server it can no longer be reported to that server as junk. When the
user configures junk reporting on the MUA, the user would get notice of
this requirement and can configure the retention period which is also a
function of the MUA.
IMAP requires no special arrangements, since it may use BURL (RFC
4468, and Lemonade enhancements) if bandwidth is a problem. A message
may be moved to a junk folder before reporting it, for limited
retention issues.
For POP3, I see no way but resending the whole message.
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