No, that is not really a false alarm, but it is not a Virus or Backdoor !;)
A bit confusing. It is so called Malware. It is a programm to fake the Emailheader and Emailadress. Other AV-Prgramms flag this Software too. You can discuss, if it is nessecary to add Programms like that to the AV-Database, but i think all "bigger" Companys decided to do so. Maybe to avoid that this kind of Software will be installed onto a Companys( Network.) Client. Under normal circumstances you do not need such kind of Software.