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Accepted
alfish
Asked: 2013-10-23 08:51:08 +0800 CST

无法在 Debian Squeeze 上安装 postfix

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我有这个奇怪的问题：apt-get 或 aptitude 无法安装 postfix。每次我收到此错误时：

# apt-get install postfix
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 postfix : Depends: libsasl2-2 but it is not going to be installed
E: Broken packages

和

# aptitude install postfix
The following NEW packages will be installed:
  postfix ssl-cert{a} 
0 packages upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,417 kB of archives. After unpacking 3,535 kB will be used.
The following packages have unmet dependencies:
  exim4-config: Conflicts: postfix but 2.7.1-1+squeeze1 is to be installed.
  libsasl2-2: Breaks: postfix (<= 2.8.3-1) but 2.7.1-1+squeeze1 is to be installed.
The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     postfix [Not Installed]                            



Accept this solution? [Y/n/q/?] y
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.

/etc/apt/sources.list：

# deb http://ftp.de.debian.org/debian/ squeeze main

deb http://ftp.de.debian.org/debian/ squeeze main
deb-src http://ftp.de.debian.org/debian/ squeeze main

deb http://security.debian.org/ squeeze/updates main
deb-src http://security.debian.org/ squeeze/updates main

# squeeze-updates, previously known as 'volatile'
deb http://ftp.de.debian.org/debian/ squeeze-updates main
deb-src http://ftp.de.debian.org/debian/ squeeze-updates main



deb http://packages.dotdeb.org squeeze all
deb-src http://packages.dotdeb.org squeeze all


# MariaDB 10.0 repository list - created 2013-10-11 09:14 UTC
# http://mariadb.org/mariadb/repositories/
deb http://mirror.netcologne.de/mariadb/repo/10.0/debian squeeze main
deb-src http://mirror.netcologne.de/mariadb/repo/10.0/debian squeeze main

我试图 --purge 删除 potfix 和 exim5，然后重新安装，但问题仍然存在。感谢您的提示。

postfix

1 个回答

  1. Best Answer

    在 Debian 上，大量软件包需要 MTA。尝试清除 exim 或任何其他 MTA 将导致安装替代方案。替代方案的顺序是，删除 exim 将导致安装 exim 的替代版本或另一个 MTA。这些要求、备选方案和冲突使更改已安装的 MTA 有点棘手。由于简单地清除 MTA 并不容易，而且如果您确实尝试清除 MTA，您还必须安装几乎所有可以使用 MTA 的东西。

    为了处理这种 MTA 怪异，我的解决方案是安装 SSMTP。

    SSMTP 包，它是一个轻量级的无守护程序仅传出 MTA，将满足 MTA 要求，并且不会与其他 MTA 冲突。因此，您可以与标准存储库中的所有其他 MTA 同时安装 SSMTP。安装后，您可以清除 exim 或其他 MTA，并根据您的喜好进行更改。SSMTP 将满足 MTA 要求，并且不会导致 APT 做出令人困惑的事情来尝试确保您安装了 MTA。

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