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180 lines
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Text
180 lines
7 KiB
Text
#!/bin/cat
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$Id: FAQ.Archiving.txt,v 1.27 2022/05/19 08:56:06 gilles Exp gilles $
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This documentation is also available online at
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https://imapsync.lamiral.info/FAQ.d/
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https://imapsync.lamiral.info/FAQ.d/FAQ.Archiving.txt
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=======================================================================
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Imapsync issues and tips about archiving
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=======================================================================
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Questions answered in this FAQ are:
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Q. How can I archive different accounts on the same destination account,
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each account on a separate folder?
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Q. How can I restore a complete account backuped in a subfolder, like
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a backup done with the option --subfolder2?
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Q. How to move emails from one IMAP folder to another, either on the
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same IMAP server or on a different one? Example:
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How to move all messages older than 1 year, from INBOX to Archive?
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Q. Can imapsync be used to maintain and restore a local offline copy
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of a mailbox, eg for backup purposes, using Mbox or Maildir
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format, so that if the server fails, then the mailbox could be
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reinstated?
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Q. How to archive a whole year in a subfolder?
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Q. How to archive a whole year in subfolders but without subsubfolders?
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Now the questions again with their answers.
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https://imapsync.lamiral.info/FAQ.d/FAQ.Archiving.txt
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=======================================================================
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Q. How can I archive different accounts on the same destination account,
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each account on a separate folder?
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R. Use --subfolder2
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--subfolder2 str : Syncs the whole host1 folders hierarchy under the
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host2 given folder str.
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(It does it internally by adding two --regextrans2
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options before all others.)
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Examples:
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To backup the account Foo in a subfolder called FooArchiv:
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imapsync ... --user1 Foo --subfolder2 FooArchiv
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To backup the account Bar in a subfolder called BarArchiv:
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imapsync ... --user1 Bar --subfolder2 BarArchiv
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In case you need a very strict sync, add options
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--delete2 --delete2foldersonly "FooArchiv"
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(or "BarArchiv" for the second example).
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It will delete on account2 what is not on account1 but only in the right place,
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ie, the subfolder "FooArchiv".
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Examples:
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To mirror the account Foo in a subfolder called FooArchiv:
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imapsync ... --user1 Foo --subfolder2 FooArchiv --delete2 --delete2foldersonly "FooArchiv"
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To mirror the account Bar in a subfolder called BarArchiv:
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imapsync ... --user1 Bar --subfolder2 BarArchiv --delete2 --delete2foldersonly "BarArchiv"
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See how to restore those with the next Q/R.
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=======================================================================
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Q. How can I restore a complete account backuped in a subfolder, like
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a backup done with the option --subfolder2?
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R. Use --subfolder1
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--subfolder1 str : Syncs the host1 folders hierarchy under folder str
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to the root hierarchy of host2.
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It's the couterpart of a sync done by --subfolder2
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when doing it in the reverse order.
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Backup/Restore scenario:
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Use --subfolder2 str for a backup to the folder str
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on host2. Then use --subfolder1 str for restoring
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from the folder str, after inverting
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host1/host2 user1/user2 values.
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Examples:
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To restore the whole folder FooArchiv hierarchy into the Foo account:
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imapsync ... --user2 Foo --subfolder1 FooArchiv
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To restore the whole folder BarArchiv hierarchy into the Bar account:
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imapsync ... --user2 Bar --subfolder1 BarArchiv
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Read the previous FAQ item "How can I archive different accounts on the same
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destination account, each account on a separate folder?"
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=======================================================================
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Q. How to move emails from one IMAP folder to another, either on the
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same IMAP server or on a different one? Example:
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How to move all messages older than 1 year, from INBOX to Archive?
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R1. Solution:
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imapsync ... --minage 365 --folder INBOX --f1f2 INBOX=Archive --delete1 --noexpungeaftereach
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Use the option --noexpungeaftereach if speed is a concern.
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Use the option --delete1 if you want to move messages, instead of just copy/sync them.
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R2. See also file FAQ.Folders_Mapping.txt
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https://imapsync.lamiral.info/FAQ.d/FAQ.Archiving.txt
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=======================================================================
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Q. Can imapsync be used to maintain and restore a local offline copy
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of a mailbox, eg for backup purposes, using Mbox or Maildir
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format, so that if the server fails, then the mailbox could be
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reinstated?
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R1. No. Imapsync plays with IMAP servers only.
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R2. Imapsync can't but rick-sanders-imap-tools can!
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See https://github.com/andrewnimmo/rick-sanders-imap-tools
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Back up and restore IMAP accounts with imapdump.pl and dumptoIMAP.pl
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It looks like imapdump.pl has options to avoid duplicates and be
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in an update mode. There are options -u -U
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[-u] Don't dump messages already dumped
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[-U] Don't dump message if it already exists in the dump directory
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I wonder the difference, I've never used Rick's tools.
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Remember that doing backups without trying the restore process
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is more dangerous than doing no backups at all. No backups makes
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people act in a safer way, well, usually...
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R3. Use isync or mbsync
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https://isync.sourceforge.io/
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R4. Use ImportExportTools for Mozilla Thunderbird by Paolo Kaosmos.
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ImportExportTools does not do IMAP as a destination.
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R5. There is a free online service (French language) allowing you to do
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a Maildir or EML or HTML backup at
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https://www.powermail.fr/sauvegarder-une-boite-mail/
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Prefer Maildir or EML format if you want to be able to restore the
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archive. HTML format will be ok to only view the messages, not to
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restore them to an imap server account.
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I have never used any of this tools so asking me for support with them
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won't go far away.
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=======================================================================
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Q. How to backup a whole year in a subfolder?
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R. To backup the whole year 2018 in a subfolder called ARCHIVE_2018:
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imapsync ... --search "SENTSINCE 1-Jan-2018 SENTBEFORE 31-Dec-2018" \
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--subfolder2 ARCHIVE_2018
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=======================================================================
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Q. How to archive a whole year in subfolders but without subsubfolders?
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R. Instead of the solution with --subfolder2, use:
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imapsync ... --search "SENTSINCE 1-Jan-2018 SENTBEFORE 31-Dec-2018" \
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--sep2 _ --regextrans2 's{(.*)}{Archive_$1_2018}'
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For each folder "FFFF" in the source account, it will create a destination
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folder called "Archive_FFFF_2018", at the top level hierarchy.
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=======================================================================
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=======================================================================
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