MailKit returns duplicate folders from SmarterMail 13.0 server

[vzhusel]

I guess this is SmarterMail issue, but wanted to check if there's a solution how to prevent this from happening using MailKit.

Structure on server:
Inbox
- 2222
- TTT
Deleted Items
Junk E-Mail
Sent Items

But from mail kit I get:
Inbox
Deleted Items
- 2222
- TTT
- 2222
- TTT
Junk E-Mail
Sent Items
- 2222
- TTT

Here's a log
Connected to imap://10.211.55.4:143/
S: * OK IMAP4rev1 SmarterMail
C: E00000000 CAPABILITY
S: * CAPABILITY IMAP4rev1 UIDPLUS XLIST
S: E00000000 OK CAPABILITY completed
C: E00000001 LOGIN admin@zzz 123qwe
S: * CAPABILITY IMAP4rev1 UIDPLUS XLIST
S: E00000001 OK LOGIN completed
C: E00000002 LIST "" ""
S: * LIST (\Noselect) "/" ""
S: E00000002 OK LIST completed
C: E00000003 LIST "" "INBOX"
S: * LIST (\Unmarked) "/" "Inbox"
S: E00000003 OK LIST completed
C: E00000004 XLIST "" "*"
S: * XLIST (\Unmarked \Trash) "/" "Deleted Items"
S: * XLIST (\Unmarked \Inbox) "/" "Inbox"
S: * XLIST (\Unmarked \Spam) "/" "Junk E-Mail"
S: * XLIST (\Unmarked \Sent) "/" "Sent Items"
S: * XLIST (\Unmarked) "/" "Inbox/TTT"
S: * XLIST (\Unmarked) "/" "Inbox/2222"
S: E00000004 OK XLIST completed
C: E00000005 LIST "" "%"
S: * LIST (\Unmarked) "/" "Deleted Items"
S: * LIST (\Unmarked) "/" "Inbox"
S: * LIST (\Unmarked) "/" "Junk E-Mail"
S: * LIST (\Unmarked) "/" "Sent Items"
S: E00000005 OK LIST completed
C: E00000006 LIST "" "Deleted Items/%"
S: * LIST (\Unmarked) "/" "Inbox/TTT"
S: * LIST (\Unmarked) "/" "Inbox/2222"
S: E00000006 OK LIST completed
C: E00000007 LIST "" "Inbox/TTT/%"
S: E00000007 OK LIST completed
C: E00000008 LIST "" "Inbox/2222/%"
S: E00000008 OK LIST completed
C: E00000009 LIST "" "Inbox/%"
S: * LIST (\Unmarked) "/" "Inbox/TTT"
S: * LIST (\Unmarked) "/" "Inbox/2222"
S: E00000009 OK LIST completed
C: E00000010 LIST "" "Inbox/TTT/%"
S: E00000010 OK LIST completed
C: E00000011 LIST "" "Inbox/2222/%"
S: E00000011 OK LIST completed
C: E00000012 LIST "" "Junk E-Mail/%"
S: * LIST (\Unmarked) "/" "Inbox/TTT"
S: * LIST (\Unmarked) "/" "Inbox/2222"
S: E00000012 OK LIST completed
C: E00000013 LIST "" "Inbox/TTT/%"
S: E00000013 OK LIST completed
C: E00000014 LIST "" "Inbox/2222/%"
S: E00000014 OK LIST completed
C: E00000015 LIST "" "Sent Items/%"
S: * LIST (\Unmarked) "/" "Inbox/TTT"
S: * LIST (\Unmarked) "/" "Inbox/2222"
S: E00000015 OK LIST completed
C: E00000016 LIST "" "Inbox/TTT/%"
S: E00000016 OK LIST completed
C: E00000017 LIST "" "Inbox/2222/%"
S: E00000017 OK LIST completed

Thank you.

[jstedfast]

This is why:

C: E00000006 LIST "" "Deleted Items/%"
S: * LIST (\Unmarked) "/" "Inbox/TTT"
S: * LIST (\Unmarked) "/" "Inbox/2222"
S: E00000006 OK LIST completed

The client is asking for subfolders of "Deleted Items" and the server is responding with children of Inbox which makes absolutely no sense at all.

[vzhusel]

This is what I was thinking. Thank you, for confirming this. Closing

[jstedfast]

I've added logic to try and filter that out but I don't have a good test case so perhaps you can test it out and let me know if it works.

[vzhusel]

Verified, working as expected. Thank you