Hi,
this is not an issue of ActiveUp.Net.Mail.
It is an issue of IMAP protocol.
The IMAP protocol does not support searches at a granularity finer than a day.
Please refer to
http://www.ietf.org/rfc/rfc3501.txt[
^]
There it says:
"SENTSINCE
Messages whose [RFC-2822] Date: header (disregarding time and
timezone) is within or later than the specified date."
Best regards,
Stephan