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

IMAP4 は有料なのでpop3 を使う

~/.getmail/nifty.rc として設定を作成

[retriever]
#type = SimplePOP3SSLRetriever
type = BrokenUIDLPOP3SSLRetriever
server = pop.nifty.com
#port 995
username = <USERNAME>
password = <PASSWORD>
use_apop = true

[option]
delete = false

[destination]
type = Maildir
path = ~/Maildir/nifty/

※ delete = false は既定値だが一応設定

dir 作成

$ mkdir -p ~/Maildir/nifty/cur
$ mkdir -p ~/Maildir/nifty/new
$ mkdir -p ~/Maildir/nifty/tmp

$ getmail                                                                                                                                                                                 
getmail version 6.18.11                                                                                                                                                                                            
Copyright (C) 1998-2023 Charles Cazabon and others. Licensed under GNU GPL version 2.                                                                                                                              
BrokenUIDLPOP3SSLRetriever:CQA22262@pop.nifty.com:995: read_all and not delete -- all messages will be retrieved each time getmail is run                                                                          
BrokenUIDLPOP3SSLRetriever:CQA22262@pop.nifty.com:995:                                                                                                                                                             
  msg      1/438209 (2322 bytes) delivered                                                                                                                                                                         
  msg      2/438209 (1987 bytes) delivered                                                                                                                                                                         
  msg      3/438209 (1464 bytes) delivered             
  :

path の最後が / じゃないので怒られている

o : ~/Maildir/nifty/
x : ~/Maildir/nifty

Configuration error: configuration file /home/matoken/.getmail/nifty.rc incorrect (path: maildir subdirectory "/home/matoken/Maildir/nifty/cur" does not exist)                                                    
Configuration error: configuration file /home/matoken/.getmail/nifty.rc incorrect (path: maildir subdirectory "/home/matoken/Maildir/nifty/new" does not exist)                                                    
Configuration error: configuration file /home/matoken/.getmail/nifty.rc incorrect (path: maildir subdirectory "/home/matoken/Maildir/nifty/tmp" does not exist)                                                    

ディレクトリを生成する

$ mkdir -p ~/Maildir/nifty/cur
$ mkdir -p ~/Maildir/nifty/new
$ mkdir -p ~/Maildir/nifty/tmp

UIDL 未サポートなサーバなので type = SimplePOP3SSLRetriever ではなく type = BrokenUIDLPOP3SSLRetriever を使う