emailをバックアップしたり

$ dpkg -l getmail|tail -1
ii  getmail        5.13-1       all          mail retriever with support for POP3, IMAP4 and SDPS

$ mkdir -m 700 ~/.getmail
$ mkdir -p ~/getmail/mail/cur
$ mkdir -p ~/getmail/mail/new
$ mkdir -p ~/getmail/mail/tmp

$ vi ~/.getmail/getmailrc

gmailでの例

[retriever]
type = SimpleIMAPSSLRetriever
server = imap.gmail.com
#mailboxes = ("Inbox", "[Gmail]/Sent Mail") # optional - leave this line out to just grab inbox
username = USER
password = PASS

[destination]
type = Maildir
path = ~/getmail/mail/

[options]
verbose = 1
message_log = ~/.getmail/log

# retrieve only new messages
# if set to true it will re-download ALL messages every time!
read_all = false

# do not alter messages
delivered_to = false
received = false

gmailのアプリパスワードはこのページから取得 https://myaccount.google.com/apppasswords

$ getmail

$ crontab -l|grep getmail
3 2 * * *       getmail --quiet --new --dont-delete