mix Mailbox Format Support

Submitted by PaulD

Assigned to Xfce-Goodies Maintainers

Link to original bug (#7820)

Description

Please add support for mix Mailbox Format.

Version: 1.1.0 or older

Landry Breuil @landry said:

Mass-reassign all bugs from florian@ to goodies-dev@, thanks for the maintenance work! (and sorry for the bugmail spam..)

mentioned in issue #71