[PERDITION-USERS] Weird issue with Perdition 2.1 to MS Exchange

Hello. I'm currently trying to understand some issue I see with Perdition connecting to MS Exchange. For some reason some commands seem to do nothing, while they work fine if used directly and not going through Perdition (version 2.1 running on RHEL7 btw). Here's what I see when I do a packet capture on the traffic going from the server running Perdition (MS exchange = lines starting with S, and perdition on the lines starting with C): S: * OK The Microsoft Exchange IMAP4 service is ready. C: flim07 CAPABILITY S: * CAPABILITY IMAP4 IMAP4rev1 AUTH=NTLM AUTH=GSSAPI AUTH=PLAIN STARTTLS UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+ S: flim07 OK CAPABILITY completed. C: flim08 LOGIN {7} S: + Ready for additional command text. C: use-rna {20} S: + Ready for additional command text. C: thisISaLoNgPasswordd S: flim08 OK LOGIN completed. C: A002 SELECT "INBOX" ...and here it just seems to hang, no traffic is returned... If I go to the server running Perdition and run these commands manually with the help of "telnet msexchangeserver 143", they seem to work fine: * OK The Microsoft Exchange IMAP4 service is ready. flim07 CAPABILITY * CAPABILITY IMAP4 IMAP4rev1 AUTH=NTLM AUTH=GSSAPI AUTH=PLAIN STARTTLS UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+ flim07 OK CAPABILITY completed. flim08 LOGIN {7} + Ready for additional command text. use-rna {20} + Ready for additional command text. thisISaLoNgPasswordd flim08 OK LOGIN completed. A002 SELECT "INBOX" * 11 EXISTS * 0 RECENT * FLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent) * OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)] Permanent flags * OK [UNSEEN 1] Is the first unseen message * OK [UIDVALIDITY 2389685] UIDVALIDITY value * OK [UIDNEXT 45] The next unique identifier value A002 OK [READ-WRITE] SELECT completed. A003 LOGOUT * BYE Microsoft Exchange Server 2010 IMAP4 server signing off. A003 OK LOGOUT completed. Am I missing something obvious here? Regards Eivind Olsen