Mimecast Rejects Acquisition Bid From Rival Proofpoint: Report

Mimecast received a lucrative takeover proposal from Proofpoint weeks after Permira made its $5.8 billion acquisition offer but rejected the Proofpoint bid over antitrust concerns.

Sunnyvale, Calif.-based Proofpoint offered on Dec. 31 to buy Lexington, Mass.-based email security competitor…