[Bug 166634] New: kmail constantly changes modification time of unchanged (mbox) files

[A.Pfaller]

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http://bugs.kde.org/show_bug.cgi?id=166634         
           Summary: kmail constantly changes modification time of unchanged
                    (mbox) files
           Product: kmail
           Version: unspecified
          Platform: SuSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: kdepim-bugs kde org
        ReportedBy: apfaller yahoo com au


Version:            (using KDE 3.5.9)
Installed from:    SuSE RPMs
OS:                Linux

I keep a very large collection (>10GB) of past emails in an hierarchy
of email-folders (mbox). Most of these mbox files are static (e.g. because
they are archives of a mailing list from a specific year) and dont change
content. However kmail constanly changes the file modification time of
theses files causing several problems, e.g.

- incremental backups always save these files
- beagle/kerry constantly scans these files for modifications leaving
  me no other option of disabling beagle or excluding the mail directory
  from indexing although this would be one of the most useful area
  for a fast search index.

Given the amount of individual messages contained in these archives
maildir storage is not really usable.

It would be nice if kmail would only open mbox files for write if
it actually needs to modify a file.