Samuel G Silberman

US Patent:

7689659, Mar 30, 2010

Filed:

Aug 16, 2004

Appl. No.:

10/919655

Inventors:

Mark H. Granoff - Framingham MA, US
Samuel G. Silberman - Arlington MA, US

Assignee:

Openwave Systems Inc. - Redwood City CA

International Classification:

G06F 15/16
G06F 15/173

US Classification:

709207, 709238, 709202

Abstract:

A classifier is implemented to determine the number of message transfer agents (MTAs) through which an email message has traveled. If the number of MTAs through which the email message has traveled is below a predetermined threshold and the email message is not otherwise authenticated, the classifier will designate the email message as abusive.

US Patent:

8239469, Aug 7, 2012

Filed:

Feb 23, 2010

Appl. No.:

12/711121

Inventors:

Mark H. Granoff - Framingham MA, US
Samuel G. Silberman - Arlington MA, US

Assignee:

Openwave Systems Inc. - Redwood City CA

International Classification:

G06F 15/16
G06F 15/173

US Classification:

709206, 709238

Abstract:

A classifier is implemented to determine the number of message transfer agents (MTAs) through which an email message has traveled. If the number of MTAs through which the email message has traveled is below a predetermined threshold and the email message is not otherwise authenticated, the classifier will designate the email message as abusive.

US Patent:

8239474, Aug 7, 2012

Filed:

Sep 23, 2011

Appl. No.:

13/244115

Inventors:

Mark H. Granoff - Framingham MA, US
Samuel G. Silberman - Arlington MA, US

Assignee:

Openwave Systems Inc. - Redwood City CA

International Classification:

G06F 15/16
G06F 15/173

US Classification:

709206, 709238

Abstract:

A classifier is implemented to determine the number of message transfer agents (MTAs) through which an email message has traveled. If the number of MTAs through which the email message has traveled is below a predetermined threshold and the email message is not otherwise authenticated, the classifier will designate the email message as abusive.

US Patent:

8499042, Jul 30, 2013

Filed:

Jun 8, 2004

Appl. No.:

10/864141

Inventors:

Samuel G. Silberman - Arlington MA, US
Mark H. Granoff - Framingham MA, US
Rajesh P. Chaube - Tokyo, JP
Robert M. Fleischman - Concord NH, US
Michael S. Zraly - Somerville MA, US

Assignee:

Unwired Planet, Inc. - Redwood City CA

International Classification:

G06F 15/16

US Classification:

709206, 709203

Abstract:

According to a first embodiment of the invention, if an e-mail sender attempts to make too many connections within a predetermined period of time, the excess connections are automatically rejected. According to a second embodiment of the invention, an agreement is established between an e-mail sender and an e-mail recipient that states when the sender may send e-mail messages to the recipient. According to a third embodiment of the invention, trend data reflecting an amount of e-mail sent by a sender is collected. The trend data can be used to establish a rate limit for the sender. According to a fourth embodiment of the invention, separate rate limits are established for authenticated and unauthenticated mail from addresses. According to a fifth embodiment of the invention, a sender may have a rate at which their e-mail is transmitted reduced if they exceed predetermined rate limits.

US Patent:

20030074408, Apr 17, 2003

Filed:

Sep 28, 2001

Appl. No.:

09/968426

Inventors:

Jonathan Clark - Holmdel NJ, US
Samuel Silberman - Arlington MA, US

International Classification:

G06F015/173

US Classification:

709/206000, 709/225000

Abstract:

A message transfer agent (MTA) in a network domain on a network receives an email, the envelope of which contains the address of the intended recipient. The MTA accesses account data of the intended recipient to identify a realm of the intended recipient, from a plurality of realms defined within the network domain. Each realm may include one or more MTAs. The MTA determines whether it is responsible for the realm of the intended recipient and, if so, stores the communication in an associated message store server. If the MTA is not in the realm of the intended recipient, then it identifies an MTA responsible for the realm of the intended recipient within the same network domain and relays the email within the network domain to the other MTA, without altering the recipient address of the email.

US Patent:

20140040388, Feb 6, 2014

Filed:

Jul 8, 2013

Appl. No.:

13/936429

Inventors:

Samuel G. Silberman - Arlington MA, US
Mark H. Granoff - Framingham MA, US
Rajesh P. Chaube - Tokyo, JP
Robert M. Fleischman - Concord NH, US
Michael S. Zraly - Somerville MA, US

Assignee:

UNWIRED PLANET, INC. - Redwood City CA

International Classification:

H04L 12/58

US Classification:

709206

Abstract:

According to a first embodiment of the invention, if an e-mail sender attempts to make too many connections within a predetermined period of time, the excess connections are automatically rejected. According to a second embodiment of the invention, an agreement is established between an e-mail sender and an e-mail recipient that states when the sender may send e-mail messages to the recipient. According to a third embodiment of the invention, trend data reflecting an amount of e-mail sent by a sender is collected. The trend data can be used to establish a rate limit for the sender. According to a fourth embodiment of the invention, separate rate limits are established for authenticated and unauthenticated mail from addresses. According to a fifth embodiment of the invention, a sender may have a rate at which their e-mail is transmitted reduced if they exceed predetermined rate limits.

US Patent:

7539761, May 26, 2009

Filed:

Dec 19, 2003

Appl. No.:

10/742329

Inventors:

Samuel G. Silberman - Arlington MA, US

Assignee:

Openwave Systems, Inc. - Redwood City CA

International Classification:

G06F 15/16

US Classification:

709227

Abstract:

A method and system for detecting spoofed network connections comprising receiving a connection from a client, delaying sending a greeting message for a delay period, monitoring the connection during the delay period, and if a command is received from the client before the greeting is sent, then identifying the connection as a possible spoofed connection.

US Patent:

20150350137, Dec 3, 2015

Filed:

Aug 6, 2015

Appl. No.:

14/820516

Inventors:

- Reno NV, US
Samuel G. Silberman - Arlington MA, US
Mark H. Granoff - Framingham MA, US
Rajesh P. Chaube - Tokyo, JP
Robert M. Fleischman - Concord NH, US
Michael S. Zraly - Somerville MA, US

Assignee:

UNWIRED PLANET, LLC - Reno NV

International Classification:

H04L 12/58

Abstract:

According to a first embodiment of the invention, if an e-mail sender attempts to make too many connections within a predetermined period of time, the excess connections are automatically rejected. According to a second embodiment of the invention, an agreement is established between an e-mail sender and an e-mail recipient that states when the sender may send e-mail messages to the recipient. According to a third embodiment of the invention, trend data reflecting an amount of e-mail sent by a sender is collected. The trend data can be used to establish a rate limit for the sender. According to a fourth embodiment of the invention, separate rate limits are established for authenticated and unauthenticated mail from addresses. According to a fifth embodiment of the invention, a sender may have a rate at which their e-mail is transmitted reduced if they exceed predetermined rate limits.