准备写个系列，嗯，先记录下来各种参考资料网址
http://askubuntu.com/questions/178521/how-can-i-decode-a-base64-string-from-the-command-line
上面这个用于解决下面这个问题
'ascii' codec can't decode byte 0xe5 in position 0
http://piao-tech.blogspot.com/2010/03/get-offlineimap-working-with-non-ascii.html
http://unix.stackexchange.com/questions/47780/unable-to-use-offlineimap-to-sync-gmail
网易邮箱有问题(SELECT The login is not safe! Please update your mail client)：http://stackoverflow.com/questions/27797705/python-login-163-mail-server
(有新邮件就提醒：)http://forum.ubuntu.org.cn/viewtopic.php?f=73&t=250370&start=30
https://handsomecheung.github.io/mutt-manual-cn/mutt-manual-1.5.19-cn.html
https://www.neomutt.org/man/muttrc
https://liuf.net/blog/2015/12/dealing-with-email-the-right-way/
http://help.163.com/09/1223/14/5R7P3QI100753VB8.html
mutt, msmtp, tor: error sending mail 'server sent an empty reply' :https://bbs.archlinux.org/viewtopic.php?id=158920
http://stackoverflow.com/questions/37743248/external-smtp-plesk-the-server-sent-an-empty-reply
http://binli.github.io/posts/mutt-msmtp-offlineimap.html
https://ubuntuforums.org/archive/index.php/t-931690.html
http://www.2cto.com/os/201312/264001.html
https://www.zhukun.net/archives/7386
https://linux.cn/forum.php?mod=viewthread&tid=13671
http://zoomq.qiniudn.com/ZQScrapBook/ZqFLOSS/data/20060814150747/
http://www.ctex.org/documents/shredder/mutt.html
http://www.2cto.com/os/201204/126725.html
https://pbrisbin.com/posts/mutt_gmail_offlineimap/
http://www.imtxc.com/blog/2012/04/22/use-gmail-plus-mutt-plus-msmtp-plus-offlineimap/
https://bbs.archlinux.org/viewtopic.php?id=25966
http://ikuduku.com/blog/mailclient-mutt-fetchmail-procmail-msmtp
http://blog.csdn.net/tge7618291/article/details/7474615
https://amoskong.wordpress.com/2008/04/16/%E7%94%A8procmail%E8%BF%87%E6%BB%A4%E9%82%AE%E4%BB%B6/
http://www.vpsee.com/2012/06/send-and-receive-email-using-mutt-fetchmail-maildrop-msmtp/
http://www.voidcn.com/blog/tge7618291/article/p-3144340.html