Package        : enigmail
Version        : 2:1.9.8.1-1~deb7u1

In DLA 1007-1 Thunderbird was upgraded to the latest ESR series. This
update upgrades Enigmail, the OpenPGP extention for Thunderbird, to
version 1.9.8.1 to restore full compatibility.

For Debian 7 "Wheezy", these problems have been fixed in version
2:1.9.8.1-1~deb7u1.

We recommend that you upgrade your enigmail packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS