IMAPSession::fetchAllFolders use XLIST to fetch folder list even if LIST-EXTENDED is available. Shouldn't it be otherwise, since XLIST became deprecated more than 7 years ago? What is more, there appears to be no code checking for LIST-EXTENDED capability and exposing this information in the same manner as for XLIST (e.g. mListExtendedEnabled for LIST-EXTENDED).
IMAPSession::fetchAllFolders use
XLISTto fetch folder list even ifLIST-EXTENDEDis available. Shouldn't it be otherwise, sinceXLISTbecame deprecated more than 7 years ago? What is more, there appears to be no code checking forLIST-EXTENDEDcapability and exposing this information in the same manner as forXLIST(e.g. mListExtendedEnabled forLIST-EXTENDED).The following code should explain the situation:
https://github.com/MailCore/mailcore2/blob/fad23d736ed5a63cf8321469d3a98a583f55df97/src/core/imap/MCIMAPSession.cpp#L1555-L1560
XLISTis always preferred, even ifLISTcan provide the same information and is standard compliant.