package ssmtp 2.64-5build1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

Errors were encountered while processing:
 ssmtp
Error in function:
Setting up ssmtp (2.64-5build1) ...
/var/lib/dpkg/info/ssmtp.config: 11: export: #: bad variable name
dpkg: error processing ssmtp (--configure):
 subprocess installed post-installation script returned error exit status 2

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: ssmtp 2.64-5build1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic i686
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
Date: Wed Jun 20 20:32:30 2012
DuplicateSignature:
 Setting up ssmtp (2.64-5build1) ...
 /var/lib/dpkg/info/ssmtp.config: 11: export: #: bad variable name
 dpkg: error processing ssmtp (--configure):
  subprocess installed post-installation script returned error exit status 2
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
SourcePackage: ssmtp
Title: package ssmtp 2.64-5build1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: Upgraded to precise on 2012-04-29 (52 days ago)