Private company

Sendmail, Inc.

Logo: sendmail.com5

American e-mail software company

Sendmail, Inc. is an email management business. The company is headquartered in Emeryville, CA with offices throughout the Americas, Europe and Asia.3 It is part of Proofpoint, Inc.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1998Founded1
  • HeadquartersEmeryville1
  • Websitewww.sendmail.com
  • Legal formDelaware corporation1
  • Incorporated inDE6
  • Business address6475 Christie Avenue, Suite 350, Emeryville, Ca 946086
  • LEI549300F307344QL7TE924
  • StatusActive4
  • LEI statusLapsed (not renewed)4
  • Registered addressC/O RESIDENT AGENTS INC., 19901 Dover, United States4
  • Registered withDivision of Corporations, Department of State, 29662974
Sendmail Headquarters
Photo: Rickmbates, CC BY-SA 3.0, via Wikimedia Commons8

Sendmail, Inc. is an email management business.3

Corporate structure

Sendmail, Inc. is part of a group headed by Proofpoint, Inc.. 3 entities, 2 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

The story

History

The company was founded in 1999 by Eric Allman in Emeryville, CA. Eric also created sendmail, an open source mail transfer agent while he was a student and a staff member at the University of California, Berkeley. It is the commercial version of the open source version of sendmail.

Managing Email

In 2005, Sendmail released the Sentrion email infrastructure platform to address the need for full-content message inspection, enabling policy-based delivery of all human and machine-generated email.

Hybrid Cloud

In 2012, Sendmail partnered with Mimecast to provide hybrid-cloud email security, archiving and continuity as some predicted that 2013 would see more organizations implementing hybrid cloud computing strategies to reduce cost and complexity of their messaging infrastructure.

Machine-Generated Email

In 2012, Sendmail released Sentrion REAC (Rogue Email Application Control) amid growing security, compliance and other concerns posed by the growth of application-generated email and migration of email to the cloud.

Acquired by Proofpoint

In 2013, Sendmail was acquired by security-as-a-service company Proofpoint, Inc.

Timeline

1998

Released Switch, the commercial MTA

2000

Read the full text

Released Sendmail Milter API

2001

Released Mailstream Manager for email security and compliant policy management

2003

Released Mailcenter for the enterprise

2005

Shipped first Sentrion™ appliance

2006

Celebrated 25th anniversary of internet email (MTA)

2007

Shipped Sentrion MP ‘inbound & outbound’ Appliance

2008

Released Sentrion MPV and Sentrion™ MPQ

2009

Released Sentrion Cloud Services (SaaS)

2010

Opened Sentrion App Store (www.SentrionAppStore.com)

2011

Sendmail teams with Harris and BMC on trusted enterprise cloud

2011

Released Sentrion Critical Customer Communications Enterprise Application Suite

2012

Released Sentrion REAC (Rogue Email Application Control)

2013

Acquired by Proofpoint, Inc.

From Wikipedia’s article on Sendmail, Inc., shared under CC BY-SA 4.0.7

Subsidiaries and ownership

Parent company

From Wikidata.1

Timeline

  1. Oct 1, 2013Acquired Acquired by Proofpoint, Inc.1
  2. 1998Founded Founded1

SEC filer profile

How Sendmail, Inc. is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARSENDMAIL INC2
  • CIK0001058499
  • Incorporated inDelaware2
  • Business address6475 Christie Avenue, Suite 350, Emeryville, CA 946082
  • Phone510-594-54002
  • On EDGAR sinceMar 13, 20022
  • Filings5 in all: REGDEX (3), D (1), D/A (1)2