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exim4-base - support files for all Exim MTA (v4) packages…  more info»


exim4 (4.69-4) unstable; urgency=low

  In reaction to #475194, the size of the Diffie-Hellman parameters
  used by exim was increased to 2048, which is GnuTLS's default.
  Since periodically regenerating the Diffie-Hellman parameters
  doesn't increase security that much (they're sent in clear text in the
  TLS handshake, and some protocols even have hardcoded them in the
  standard document), and automatically generating 2048 bits
  Diffie-Hellman parameters can take a long time, this has been disabled
  in the Exim4 packages starting with 4.69-4. All exim installations
  will thus run with the Diffie-Hellman parameters shipped in the
  package by default.
  Really, really paranoid people with sufficiently fast machines will
  want to set up a cron job calling
  /usr/share/exim4/exim4_refresh_gnutls-params manually - suggested
  interval is weekly or monthly.

 -- Marc Haber <>  Sun, 27 Apr 2008 09:14:32 +0200

exim4 (4.30-1) unstable; urgency=low

  * Exim now runs under its own uid (Debian-exim) instead of using mail:mail.
    WARNING: You cannot downgrade this version to an older one without
    manual chown|chrgrp all files owned by Debian-exim to mail.
    Securitywise this is a tradeoff:
    - if exim is SUID root and runs without deliver_drop_privilege you win:
      exim's internal data in /var/spool/exim4 is not open to attacks by
      bugs in programs SGID mail (mail delivery agents like deliver or
      procmail, or MUAs like pine) anymore. This is Debian's default setup.
    - OTOH if you need to be able to make local deliveries to /var/mail and
      want to run exim with reduced priviledge you have some additional work
      to do:
      * Use an SGID MDA for the actual delivery (I suggest maildrop.)
      * Make changes to run exim4 under group mail:
        - exim_group=mail.
        - Hack: make Debian-exim a group with gid=8, i.e. an alias for
          the mail group, _before_ you make the upgrade. (groupadd -o -g 8

 -- Andreas Metzler <>  Sun,  7 Dec 2003 13:59:46 +0100

exim4 (4.24-1) unstable; urgency=low

  * This version of exim cannot run deliveries as root anymore, see change
    5a for exim 4.23 in /usr/share/doc/exim4-base/changelog.gz. If you
    don't redirect mail for root via /etc/aliases to a nonpriviledged
    account the mail will be delivered to /var/mail/mail with permissions
    0600 and owner mail:mail.

 -- Andreas Metzler <>  Fri,  3 Oct 2003 18:11:17 +0200
exim4 (4.22-1) unstable; urgency=low

  * The way that the $h_ (and $header_) expansions work has been changed
    by the addition of RFC 2047 decoding. See the main documentation (the
    NewStuff file until release 4.30, then the manual) for full details.

    Exim shipped with Debian defaults to HEADER_DECODE_TO="UTF-8"

 -- Andreas Metzler <>  Mon, 18 Aug 2003 16:51:47 +0200
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