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Trendmicro™ Hosted Email Security
TrendMicro™ Hosted Email Security Best Practice Guide Trend Micro Incorporated reserves the right to make changes to this document and to the products described herein without notice. The names of companies, products, people, characters, and/or data mentioned herein are fictitious and are in no way intended to represent any real individual, company, product, or event, unless otherwise noted. Complying with all applicable copyright laws is the responsibility of the user. Copyright © 2016 Trend Micro Incorporated. All rights reserved. Trend Micro, the Trend Micro t-ball logo, and TrendLabs are trademarks or registered trademarks of Trend Micro, Incorporated. All other brand and product names may be trademarks or registered trademarks of their respective companies or organizations. No part of this publication may be reproduced, photocopied, stored in a retrieval system, or transmitted without the express prior written consent of Trend Micro Incorporated. Authors : Michael Mortiz, Jefferson Gonzaga Editorial : Jason Zhang Released : June 2016 Table of Contents 1 Best Practice Configurations ................................................................................................................................. 8 1.1 Activating a domain ....................................................................................................................................... 8 1.2 Adding Approved/Blocked Sender ................................................................................................................ 8 1.3 HES order -
A Survey of Learning-Based Techniques of Email Spam Filtering
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Unitn-eprints Research A SURVEY OF LEARNING-BASED TECHNIQUES OF EMAIL SPAM FILTERING Enrico Blanzieri and Anton Bryl January 2008 (Updated version) Technical Report # DIT-06-056 A Survey of Learning-Based Techniques of Email Spam Filtering Enrico Blanzieri, University of Trento, Italy, and Anton Bryl University of Trento, Italy, Create-Net, Italy [email protected] January 11, 2008 Abstract vertising pornography, pyramid schemes, etc. [68]. The total worldwide financial losses caused by spam Email spam is one of the major problems of the to- in 2005 were estimated by Ferris Research Analyzer day’s Internet, bringing financial damage to compa- Information Service at $50 billion [31]. nies and annoying individual users. Among the ap- Lately, Goodman et al. [39] presented an overview proaches developed to stop spam, filtering is an im- of the field of anti-spam protection, giving a brief portant and popular one. In this paper we give an history of spam and anti-spam and describing major overview of the state of the art of machine learn- directions of development. They are quite optimistic ing applications for spam filtering, and of the ways in their conclusions, indicating learning-based spam of evaluation and comparison of different filtering recognition, together with anti-spoofing technologies methods. We also provide a brief description of and economic approaches, as one of the measures other branches of anti-spam protection and discuss which together will probably lead to the final victory the use of various approaches in commercial and non- over email spammers in the near future. -
Detecting Phishing in Emails Srikanth Palla and Ram Dantu, University of North Texas, Denton, TX
1 Detecting Phishing in Emails Srikanth Palla and Ram Dantu, University of North Texas, Denton, TX announcements. The third category of spammers is called Abstract — Phishing attackers misrepresent the true sender and phishers. Phishing attackers misrepresent the true sender and steal consumers' personal identity data and financial account steal the consumers' personal identity data and financial credentials. Though phishers try to counterfeit the websites in account credentials. These spammers send spoofed emails and the content, they do not have access to all the fields in the lead consumers to counterfeit websites designed to trick email header. Our classification method is based on the recipients into divulging financial data such as credit card information provided in the email header (rather than the numbers, account usernames, passwords and social security content of the email). We believe the phisher cannot modify numbers. By hijacking brand names of banks, e-retailers and the complete header, though he can forge certain fields. We credit card companies, phishers often convince the recipients based our classification on three kinds of analyses on the to respond. Legislation can not help since a majority number header: DNS-based header analysis, Social Network analysis of phishers do not belong to the United States. In this paper we and Wantedness analysis. In the DNS-based header analysis, present a new method for recognizing phishing attacks so that we classified the corpus into 8 buckets and used social the consumers can be vigilant and not fall prey to these network analysis to further reduce the false positives. We counterfeit websites. Based on the relation between credibility introduced a concept of wantedness and credibility, and and phishing frequency, we classify the phishers into i) derived equations to calculate the wantedness values of the Prospective Phishers ii) Suspects iii) Recent Phishers iv) Serial email senders. -
Efficient Spam Filtering System Based on Smart Cooperative Subjective and Objective Methods*
Int. J. Communications, Network and System Sciences, 2013, 6, 88-99 http://dx.doi.org/10.4236/ijcns.2013.62011 Published Online February 2013 (http://www.scirp.org/journal/ijcns) Efficient Spam Filtering System Based on Smart * Cooperative Subjective and Objective Methods Samir A. Elsagheer Mohamed1,2 1College of Computer, Qassim University, Qassim, KSA 2Electrical Engineering Department, Faculty of Engineering, Aswan University, Aswan, Egypt Email: [email protected], [email protected] Received September 17, 2012; revised January 16, 2013; accepted January 25, 2013 ABSTRACT Most of the spam filtering techniques are based on objective methods such as the content filtering and DNS/reverse DNS checks. Recently, some cooperative subjective spam filtering techniques are proposed. Objective methods suffer from the false positive and false negative classification. Objective methods based on the content filtering are time con- suming and resource demanding. They are inaccurate and require continuous update to cope with newly invented spammer’s tricks. On the other side, the existing subjective proposals have some drawbacks like the attacks from mali- cious users that make them unreliable and the privacy. In this paper, we propose an efficient spam filtering system that is based on a smart cooperative subjective technique for content filtering in addition to the fastest and the most reliable non-content-based objective methods. The system combines several applications. The first is a web-based system that we have developed based on the proposed technique. A server application having extra features suitable for the enter- prises and closed work groups is a second part of the system. Another part is a set of standard web services that allow any existing email server or email client to interact with the system. -
ITU Botnet Mitigation Toolkit Background Information
ITU Botnet Mitigation Toolkit Background Information ICT Applications and Cybersecurity Division Policies and Strategies Department ITU Telecommunication Development Sector January 2008 Acknowledgements Botnets (also called zombie armies or drone armies) are networks of compromised computers infected with viruses or malware to turn them into “zombies” or “robots” – computers that can be controlled without the owners’ knowledge. Criminals can use the collective computing power and connected bandwidth of these externally-controlled networks for malicious purposes and criminal activities, including, inter alia, generation of spam e-mails, launching of Distributed Denial of Service (DDoS) attacks, alteration or destruction of data, and identity theft. The threat from botnets is growing fast. The latest (2007) generation of botnets such as the Storm Worm uses particularly aggressive techniques such as fast-flux networks and striking back with DDoS attacks against security vendors trying to mitigate them. An underground economy has now sprung up around botnets, yielding significant revenues for authors of computer viruses, botnet controllers and criminals who commission this illegal activity by renting botnets. In response to this growing threat, ITU is developing a Botnet Mitigation Toolkit to assist in mitigating the problem of botnets. This document provides background information on the toolkit. The toolkit, developed by Mr. Suresh Ramasubramanian, draws on existing resources, identifies relevant local and international stakeholders, and -
M AAWG: Hosting Past, Present & Future
3 M AAWG: Hosting Past, Present & Future Justin Lane - BlueHost and M3AAWG Hosting Co-Chair Jesse Sowell, PhD and M3AAWG Advisor 5 May 2016 LACNIC 25, La Habana, Cuba www.m3aawg.org © 2015 Messaging, Malware and Mobile Anti-Abuse Working Group Hosting: Not a Big Issue, Right? For many years the Community looked at Hosting Companies like this picture. We where a small area that did not look to be that important. www.m3aawg.org © 2015 Messaging, Malware and Mobile Anti-Abuse Working Group A Brief History of Hosting Hosting Companies in the beginning where a small part of the overall environment. Most of the Hosting Companies at the time offered plans that gave their clients 20-50MB of space to use for their websites. ESP’s and ISP’s where much bigger players. www.m3aawg.org © 2015 Messaging, Malware and Mobile Anti-Abuse Working Group What Hosting Offers Hosting Companies were able to offer all the services needed to get a company online and ready to service their customers. • Email Services • CMS, and Webdesign • Hardware from Dedicated Servers or Colocation Servers to Shared or Virtual Server Space • Bandwidth for your Business, Dedicated Ips and SSL Services • Access to Hardware that most smaller businesses were not able to afford on their own. www.m3aawg.org © 2015 Messaging, Malware and Mobile Anti-Abuse Working Group What is Happening Today? As the community got better at policing ISP’s, ESP’s and other problem areas, the criminal elements began to migrate to the Hosting Platforms. With Hosting Companies these criminal elements were even better positioned to carry out their plans. -
Account Administrator's Guide
ePrism Email Security Account Administrator’s Guide - V10.4 4225 Executive Sq, Ste 1600 Give us a call: Send us an email: For more info, visit us at: La Jolla, CA 92037-1487 1-800-782-3762 [email protected] www.edgewave.com © 2001—2016 EdgeWave. All rights reserved. The EdgeWave logo is a trademark of EdgeWave Inc. All other trademarks and registered trademarks are hereby acknowledged. Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. Other product and company names mentioned herein may be the trademarks of their respective owners. The Email Security software and its documentation are copyrighted materials. Law prohibits making unauthorized copies. No part of this software or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into another language without prior permission of EdgeWave. 10.4 Contents Chapter 1 Overview 1 Overview of Services 1 Email Filtering (EMF) 2 Archive 3 Continuity 3 Encryption 4 Data Loss Protection (DLP) 4 Personal Health Information 4 Personal Financial Information 5 Document Conventions 6 Other Conventions 6 Supported Browsers 7 Reporting Spam to EdgeWave 7 Contacting Us 7 Additional Resources 7 Chapter 2 Portal Overview 8 Navigation Tree 9 Work Area 10 Navigation Icons 10 Getting Started 11 Logging into the portal for the first time 11 Logging into the portal after registration 12 Changing Your Personal Information 12 Configuring Accounts 12 Chapter 3 EdgeWave Administrator -
White Paper Barracuda • Comprehensive Email Filtering
Comprehensive Email Filtering White Paper Barracuda • Comprehensive Email Filtering Email has undoubtedly become a valued communications tool among organizations worldwide. With Spam History frequent virus attacks and the alarming influx of spam, email loses the efficiency to communicate. Spam Spam is one form of abuse messages represent the vast majority of email traffic on the Internet. Spam is no longer a simple annoyance; of the Simple Mail Transfer it is a significant security issue and a massive drain on financial resources. Protocol (SMTP), which is implemented in email systems This is simply astounding and unacceptable. It’s time to take control of spam and virus attacks. on the basis of RFC 524. First proposed in 1973, RFC 524 was Filtering Email in Two Advanced Processes developed during a time when computer security was not a Today, there are a number of solutions designed to help alleviate the spam problem. Barracuda Networks significant concern. As such, designed the affordable Barracuda Email Security Gateway as an easy-to-use, enterprise-class hardware and RFC 524 is no longer a secure software solution for businesses of all sizes that comprehensively evaluates each email, using two main command set, making it and classes of sophisticated algorithms and techniques: Connection Management and Mail Scanning. SMTP susceptible to abuse. During the connection management process, emails are filtered through five defense layers to verify Most spam-making tools authenticity of envelope information, and any inappropriate incoming mail connections are dropped exploit the security holes in even before receiving the message. Any emails that survive the connection verification process must then SMTP. -
Administrator's Guide for Synology Mailplus Server
Administrator's Guide for Synology MailPlus Server Based on Synology MailPlus Server 2.2 1 Table of Contents Introduction 01 Chapter 1: Deployment Guidelines 02 Select a Synology NAS Estimate RAM and Storage Requirements Running Multiple I/O Intensive Packages on the Same NAS Chapter 2: Getting Started with MailPlus Server 06 Connect Synology NAS to the Internet Set up DNS Set up MailPlus Server Set up MailPlus Client Run MailPlus Third-Party Email Clients Troubleshoot Chapter 3: Mail Migration 19 Create a Mail Migration Task in MailPlus Server Import System Configurations from Microsoft Exchange to MailPlus Server Chapter 4: User Licenses 27 Purchase Licenses Install Licenses Use Licenses Chapter 5: Account Settings 31 Account System Activate Accounts Manage Privileges Chapter 6: Protocol Settings 46 SMTPI MAP/POP3 Network Interface Chapter 7: SMTP Settings 50 Service Settings SMTP Secure Connection Mail Relay Chapter 8: Domain Settings 66 Domain Domain Management Chapter 9: Security Settings 83 Spam Antivirus Scan Authentication Content Protection Chapter 10: Monitor Settings 107 Monitor Server Status Monitor Mail Queue Monitor Mail Log Chapter 11: Disaster Recovery 127 High-Availability Cluster Back up and Restore Email Chapter 12: MailPlus Navigation 140 Basic Operations Advanced Settings Introduction Introduction The Synology MailPlus suite provides advanced and secure mail service with high usability. This suite consists of two packages: MailPlus Server and MailPlus. MailPlus Server is an administration console that offers diverse settings, while MailPlus is an email platform for client users. This administrator's guide will guide you through the MailPlus Server setup and give detailed configuration instructions including DNS settings, mail service migration, and other security adjustments. -
Blocklist Babel: on the Transparency and Dynamics of Open Source Blocklisting
1 Blocklist Babel: On the Transparency and Dynamics of Open Source Blocklisting Alvaro´ Feal, Pelayo Vallina, Julien Gamba, Sergio Pastrana, Antonio Nappa, Oliver Hohlfeld, Narseo Vallina-Rodriguez, and Juan Tapiador Abstract—Blocklists constitute a widely-used Internet security are protecting an estimated 3,126,410,000 user mailboxes [1]. mechanism to filter undesired network traffic based on IP/domain Similarly, MISP (Malware Intelligence Sharing Platform [2]), reputation and behavior. Many blocklists are distributed in open a popular open source threat intelligence platform, reports that source form by threat intelligence providers who aggregate and process input from their own sensors, but also from third- it is used by more than 6,000 organizations worldwide. Beyond party feeds or providers. Despite their wide adoption, many blocklists, other feeds can be used by applications to block or open-source blocklist providers lack clear documentation about restrict access. One example are feeds of Tor exit node IPs, their structure, curation process, contents, dynamics, and inter- e.g., used by Wikipedia to block users of the Tor anonymity relationships with other providers. In this paper, we perform network from editing Wikipedia due to abuses in the past [3]. a transparency and content analysis of 2,093 free and open source blocklists with the aim of exploring those questions. To Blocklists can be proprietary (i.e., commercial) or open that end, we perform a longitudinal 6-month crawling campaign source. The former are often available through rate-limited, yielding more than 13.5M unique records. This allows us to shed license-based, or pay-per-use mechanisms and are maintained light on their nature, dynamics, inter-provider relationships, and by for-profit companies specialized in threat intelligence. -
How Is E-Mail Sender Authentication Used and Misused?
How is E-mail Sender Authentication Used and Misused? Tatsuya Mori Yousuke Takahashi NTT Service Integration Laboratories NTT Service Integration Laboratories 3-9-11 Midoricho Musashino 3-9-11 Midoricho Musashino Tokyo, Japan 180-8585 Tokyo, Japan 180-8585 [email protected] [email protected] Kazumichi Sato Keisuke Ishibashi NTT Service Integration Laboratories NTT Service Integration Laboratories 3-9-11 Midoricho Musashino 3-9-11 Midoricho Musashino Tokyo, Japan 180-8585 Tokyo, Japan 180-8585 [email protected] [email protected] ABSTRACT tive way of avoiding spam filtration. Thus, e-mail sender authen- E-mail sender authentication is a promising way of verifying the tication mechanisms have attracted attention as a promising way sources of e-mail messages. Since today’s primary e-mail sender of verifying sender identities. Large webmail service providers authentication mechanisms are designed as fully decentralized ar- such as Google have leveraged sender authentication mechanisms chitecture, it is crucial for e-mail operators to know how other or- to classify authenticated sending domains as either likely legit or ganizations are using and misusing them. This paper addresses the spammy [23]. question “How is the DNS Sender Policy Framework (SPF), which Of the several e-mail sender authentication mechanisms, we fo- is the most popular e-mail sender authentication mechanism, used cus on Sender Policy Framework (SPF) [28], which is the most and misused in the wild?” To the best of our knowledge, this is used sender authentication mechanism today [16, 26, 12, 23]. Ac- the first extensive study addressing the fundamental question. -
Contents in This Issue
MARCH 2005 The International Publication on Computer Virus Prevention, Recognition and Removal CONTENTS IN THIS ISSUE 2 COMMENT RATTLING THE Plenty of phish in the sea PERLY GATES Perl/Santy is, 3 NEWS essentially, a small piece of Perl code that Microsoft one step closer to AV spreads to vulnerable Errata: February 2005 Windows NT web servers located using the Google search engine. comparative review Frédéric Perriot describes Santy’s unusual replication strategy and explains why this worm 3 VIRUS PREVALENCE TABLE exemplifies the need for the ‘defence in depth’ approach. page 4 4 VIRUS ANALYSIS Black Perl HOME SWEET HOME FEATURES Randy Abrams looks at how the security support needs and behaviours of home users have changed 6 Protecting the home user over the years, and describes how Microsoft is 9 Virus outbreak protection: network-based adapting to maximise customer support now that detection consumers’ first port of call is their ISP. page 6 11 INSIGHT New kid on the block PRODUCT REVIEWS 13 VirusBuster 2005 Professional 17 Resolution Antivirus This month: anti-spam news & events; review of Fighting Spam for Dummies; MIT Spam 20 END NOTES & NEWS Conference report; ASRG summary. ISSN 0956-9979 COMMENT ‘The number to re-enter their user data. The email lures the recipient into clicking on a link that directs them straight to the of phishing spoofed website where they are asked to enter their attacks, and the personal information, providing the phishers with access to the victim’s bank details, credit card, or on-line associated costs, shopping account. are increasing.’ In any single scam, only a small proportion of recipients will be customers of the spoofed organization, and only a David Emm small proportion of these will ‘take the bait’.