This bug was fixed in the package php-horde-listheaders - 1.2.3-1ubuntu1
--------------- php-horde-listheaders (1.2.3-1ubuntu1) xenial; urgency=medium
* Update to PHP7.0 dependencies (LP: #1563468).
-- Nishanth Aravamudan <email address hidden> Tue, 29 Mar 2016 10:23:47 -0700
This bug was fixed in the package php-horde- listheaders - 1.2.3-1ubuntu1
--------------- listheaders (1.2.3-1ubuntu1) xenial; urgency=medium
php-horde-
* Update to PHP7.0 dependencies (LP: #1563468).
-- Nishanth Aravamudan <email address hidden> Tue, 29 Mar 2016 10:23:47 -0700