오프라인 IMAPS 및 CA 인증서

이 질문은 오프라인 지도에 관한 것이지만, 기회가 주어진다면 SSL 인증서와 그 전체 처리에 대해 자세히 알아볼 수 있는 리소스를 원합니다.

최신 오프라인 지도(7.0.6)를 다운로드하고 최소 구성을 완료한 후 명령을 실행했는데 다음 오류가 발생했습니다.

Account sync Gmail:
 *** Processing account Gmail
 Establishing connection to imaps://imap.gmail.com:993 (GmailRemote)
 ERROR: No CA certificates and no server fingerprints configured.  You must configure at least something, otherwise having SSL helps nothing.
 *** Finished account 'Gmail' in 0:00
ERROR: Exceptions occurred during the run!
ERROR: No CA certificates and no server fingerprints configured.  You must configure at least something, otherwise having SSL helps nothing.

Traceback:
  File "/usr/local/lib/python2.7/dist-packages/offlineimap/accounts.py", line 271, in syncrunner
    self.__sync()
  File "/usr/local/lib/python2.7/dist-packages/offlineimap/accounts.py", line 334, in __sync
    remoterepos.getfolders()
  File "/usr/local/lib/python2.7/dist-packages/offlineimap/repository/IMAP.py", line 448, in getfolders
    imapobj = self.imapserver.acquireconnection()
  File "/usr/local/lib/python2.7/dist-packages/offlineimap/imapserver.py", line 511, in acquireconnection
    af=self.af,
  File "/usr/local/lib/python2.7/dist-packages/offlineimap/imaplibutil.py", line 194, in __init__
    super(WrappedIMAP4_SSL, self).__init__(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/offlineimap/bundled_imaplib2.py", line 2135, in __init__
    IMAP4.__init__(self, host, port, debug, debug_file, identifier, timeout, debug_buf_lvl)
  File "/usr/local/lib/python2.7/dist-packages/offlineimap/bundled_imaplib2.py", line 357, in __init__
    self.open(host, port)
  File "/usr/local/lib/python2.7/dist-packages/offlineimap/imaplibutil.py", line 201, in open
    "having SSL helps nothing.", OfflineImapError.ERROR.REPO)

내 Gmail 계정에서 모든 메일을 다운로드한 다음 mutt로 메일을 읽는 방법을 알아내고 싶습니다. 하지만 먼저 내가 원하는 것은 모든 메일이 담긴 폴더를 만드는 것입니다.

이것은 내 .offlineimaprc입니다.

[general]
accounts = Gmail

[Account Gmail]
localrepository = GmailLocal
remoterepository = GmailRemote
ssl = yes
synclabels = yes

[Repository GmailLocal]
type = Maildir
localfolders = ~/Mail/Gmail

[Repository GmailRemote]
type = IMAP
remotehost = imaps://imap.gmail.com
remoteuser = [MY_E-MAIL]@gmail.com