Torrance-based LiveOffice, a provider of email archiving and compliance software-as-a-service, reported Monday that the firm has signed on magazine publisher Source Interlink. The firm said that Source Interlink, which has more than 7,000 employees and three major operating divisions, will use the firm for email archiving. Financial impact of the win was not disclosed. LiveOffice said its products were selected over competitors MessageOne, Mimosa Systems NearPoint and Symantec Enterprise Vault. LiveOffice is backed by private equity firm Summit Partners.