[~]# dpkg -i /var/cache/apt/archives/libsasl2-2_2.1.22.dfsg1-8_i386.deb
dpkg: considering removing postfix in favour of libsasl2-2 ...
postfix is not properly installed - ignoring any dependencies on it.
dpkg: package postfix requires reinstallation, will not remove.
dpkg: regarding .../libsasl2-2_2.1.22.dfsg1-8_i386.deb containing libsasl2-2:
 libsasl2-2 conflicts with postfix (<< 2.3.4-3)
  postfix (version 2.3.4-2) is broken due to failed removal.
dpkg: error processing /var/cache/apt/archives/libsasl2-2_2.1.22.dfsg1-8_i386.deb (--install):
 conflicting packages - not installing libsasl2-2
Errors were encountered while processing:
 /var/cache/apt/archives/libsasl2-2_2.1.22.dfsg1-8_i386.deb