Hi,

MailKit returns a syntax error when parsing a folder list that contains a folder named "NIL":

Syntax error in untagged LIST response. Unexpected token: NIL

The IMAP protocol log:

C: C00000005 LIST "" "%"
S: * LIST (\HasNoChildren) "/" Drafts
S: * LIST (\HasChildren) "/" INBOX
S: * LIST (\HasNoChildren) "/" NIL
S: * LIST (\HasNoChildren) "/" Sent
S: * LIST (\HasNoChildren) "/" Spam
S: * LIST (\HasNoChildren) "/" Trash
S: C00000005 OK LIST completed

AFAIK a folder named "NIL" is allowed according to RFC3501.

Thanks,