Wholly-Owned Subsidiaries

Jurisdiction of Incorporation

PROOFPOINT AUSTRIA GMBH

PROOFPOINT CANADA INC.

Austria

Ontario, Canada

PROOFPOINT GMBH

Federal Republic of Germany

PROOFPOINT INTERNATIONAL, INC.

Delaware, USA

PROOFPOINT JAPAN KK

Japan

PROOFPOINT LIMITED

England and Wales

PROOFPOINT MALTA LTD

Republic of Malta

PROOFPOINT NETHERLANDS B.V.

PROOFPOINT PTY LTD

Netherlands

Commonwealth of Australia

PROOFPOINT SINGAPORE PTE. LTD.

Republic of Singapore

NEXTPAGE, INC.

Delaware, USA

PROOFPOINT NI LTD.

Northern Ireland

ABACA TECHNOLOGY CORPORATION

Delaware, USA

ARMORIZE TECHNOLOGIES, INC. (US)

Delaware, USA

SENDMAIL, INC.

Delaware, USA

SENDMAIL INTERNATIONAL, INC.

Delaware, USA

SENDMAIL SARL

France

NETCITADEL, INC.

Delaware, USA

NEXGATE, INC.

Delaware, USA

EMERGING THREATS PRO, LLC

Indiana, USA

META NETWORKS LTD

META NETWORKS, INC.

MOSCOW ACQUISITION CORPORATION

Israel

Delaware, USA

Delaware, USA

SOCIALWARE, INC.

Delaware, USA

OBSERVEIT LTD

OBSERVEIT, INC.

OBSERVEIT AUSTRALIA PTY LIMITED

OBSERVEIT INTERNATIONAL UK LIMITED

GABESOFT, INC.

ONTARIO ACQUISITION CORPORATION

Israel

Delaware, USA

Commonwealth of Australia

England and Wales

Delaware, USA

Delaware, USA

PROOFPOINT ISRAEL LTD

Israel

PROOFPOINT ISRAEL HOLDINGS LTD

Israel

FIRELAYERS, INC.

Delaware, USA

CLOUDMARK, LLC

Delaware, USA

CLOUDMARK EUROPE LIMITED

England and Wales

BIZANGA LIMITED

England and Wales

CLOUDMARK LABS SARL

France

WEBLIFE BALANCE, INC.

Delaware, USA

WOMBAT SECURITY TECHNOLOGIES, INC.

Delaware, USA

WOMBAT SECURITY TECHNOLOGIES UK LTD

England and Wales

PROOFPOINT MIDDLE EAST FZ-LLC

Dubai

PROOFPOINT SPAIN SEC S.L.

Spain