脱机同步和读取Gmail，使用isync或offlineimap

Question

我的目标是同步我的电子邮件从一个Gmail帐户和索引，以搜索和阅读在Emacs。后者还没有意义，因为我无法让电子邮件同步到我的笔记本电脑。

我在经营小牛，所以在Mac终端工作。

我跟踪了SO accepted answer and the answer in the same thread试图使用offlineimap，以及this (more promising) tutorial on using 中的第二个方法(也就是mbsync)。这两种方式最后都使用了mu和Emacs的接口：mu4e。

证书未被正确读取/解释。我不知道为什么，因为我不理解错误信息。这是离线地图上的一张：

> OfflineIMAP 6.5.7
  Licensed under the GNU GPL v2 or any later version (with an OpenSSL exception)
Account sync Gmail:
 *** Processing account Gmail
 Establishing connection to imap.gmail.com:993
 PLAIN authentication failed: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure)
 LOGIN authentication failed: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure)
 ERROR: All authentication types failed:
    PLAIN: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure)
    LOGIN: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure)
 *** Finished account 'Gmail' in 0:01
ERROR: Exceptions occurred during the run!
ERROR: All authentication types failed:
    PLAIN: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure)
    LOGIN: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure)
> 
> Traceback:   File
> "/usr/local/Cellar/offline-imap/6.5.7/libexec/offlineimap/accounts.py",
> line 263, in syncrunner
>     self.__sync()   File "/usr/local/Cellar/offline-imap/6.5.7/libexec/offlineimap/accounts.py",
> line 326, in __sync
>     remoterepos.getfolders()   File "/usr/local/Cellar/offline-imap/6.5.7/libexec/offlineimap/repository/IMAP.py",
> line 351, in getfolders
>     imapobj = self.imapserver.acquireconnection()   File "/usr/local/Cellar/offline-imap/6.5.7/libexec/offlineimap/imapserver.py",
> line 451, in acquireconnection
>     self.__authn_helper(imapobj)   File "/usr/local/Cellar/offline-imap/6.5.7/libexec/offlineimap/imapserver.py",
> line 366, in __authn_helper
>     "failed:\n\t%s"% msg, OfflineImapError.ERROR.REPO)

这是mbsync的

> C: 0/3  B: 0/2  M: +0/0 *0/0 #0/0  S: +0/0 *0/0 #0/0
Error while loading certificate file '/usr/local/etc/openssl/certs/Equifax.crt': error:00000000:lib(0):func(0):reason(0)
C: 3/3  B: 0/2  M: +0/0 *0/0 #0/0  S: +0/0 *0/0 #0/0

我已经安装了所有与家庭自制，并正在使用的文件夹，根据教程。问题来自于证书，但我不知道问题可能是什么。我有Gmail内的设置，允许IMAP，也允许不太安全的应用程序的连接。

如何以不同的方式处理证书？

Answer 1

对于离线映射错误，谷歌抱怨你没有使用Oauth2。在下面的解释中，我通过了同样的离线映射问题：https://github.com/OfflineIMAP/offlineimap/issues/228

您需要将.offlineimaprc配置为使用Oauth2，而不是指定用户名/密码。下面是关于如何生成令牌的模板和说明：https://github.com/OfflineIMAP/offlineimap/blob/master/offlineimap.conf#L764

以下是重要的设置：

auth_mechanisms = GSSAPI, CRAM-MD5, XOAUTH2, PLAIN, LOGIN
oauth2_client_secret = ...
oauth2_client_id = ...
oauth2_refresh_token = ...