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Secure E-mail Gateway - Appliance

Secure E-mail Gateway - Appliance

According to technology research firm Gartner, secure email gateways “provide basic message transfer agent functions; inbound filtering of spam, phishing, malicious and marketing emails; and outbound data loss prevention (DLP) and email encryption.”

To put that in simpler language, a secure email gateway (also called an email security gateway) is a cybersecurity solution that monitors incoming and outgoing messages for suspicious behavior, preventing them from being delivered. Secure email gateways can be deployed via an email server, public cloud, on-premises software, or in a hybrid system. According to cybersecurity experts, none of these deployment options are inherently superior; each one has its own strengths and weaknesses that must be assessed by the individual enterprise.

Gartner defines the secure email gateway market as mature, with the key capabilities clearly defined by market demands and customer satisfaction. These capabilities include:

  • Basic and Next-Gen Anti-Phishing and Anti-Spam
  • Additional Security Features
  • Customization of the Solution’s Management Features
  • Low False Positive and False Negative Percentages
  • External Processes and Storage

Secure email gateways are designed to surpass the traditional detection capabilities of legacy antivirus and anti-phishing solutions. To do so, they offer more sophisticated detection and prevention capabilities; secure email gateways can make use of threat intelligence to stay up-to-date with the latest threats.

Additionally, SEGs can sandbox suspicious emails, observing their behavior in a safe, enclosed environment that resembles the legitimate network. Security experts can then determine if it is a legitimate threat or a false positive.

Secure email gateway solutions will often offer data loss prevention and email encryption capabilities to protect outgoing communications from prying and unscrupulous eyes.

Much like SIEM or endpoint detection and response (EDR), secure email gateways can produce false positives and false negatives, although they do tend to be far less than rates found in SIEM and EDR alerts.

Compare of products in the category Secure E-mail Gateway - Appliance

Compare: Secure E-mail Gateway
Characteristics
Malware Protection
Anti-spam
Bulk eMail Protection
DMARC
Advanced Threat Protection
N/A
Yes
Yes
Yes
Yes
N/A
Yes
Additional option
Yes
Yes
N/A
No
Yes
Partially
Yes
Anti-phishing
Denial of Service (DoS) Attack Protection
User Based Filtering and Policy Creation
Yes
Yes
N/A
Partially
Yes
N/A
Yes
Yes
Partially
Yes
N/A
Yes
Yes
Yes
Yes
Data Loss Prevention
Yes
Partially
Yes
Yes
Yes
N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Encryption
Yes
TLS
N/A
TLS, S/MIME
TLS, S/MIME, PGP
TLS
TLS
Additional option
TLS, S/MIME
TLS, S/MIME, PGP
TLS
TLS
TLS
No
TLS, S/MIME, PGP
Integrations
  • DLP
  • eDiscovery
  • DLP
  • N/A
  • DLP
  • Web Security Gateways
  • Firewall
  • SIEM
  • DLP
  • DLP
  • Web Security Gateways
  • Firewall
  • SIEM
  • DLP
  • N/A
  • N/A
  • N/A
  • N/A
  • DLP
  • N/A
  • eDiscovery
  • SIEM
Archiving
Deployment Options
  • Appliance
  • Cloud
  • Appliance
  • Virtual
  • Cloud
  • Appliance
  • Virtual
  • Cloud
  • Appliance
  • Virtual
  • Cloud
  • Appliance
  • Virtual
  • Cloud
  • Appliance
  • Virtual
  • Appliance
  • Cloud
  • Appliance
  • Virtual
  • Cloud
  • Appliance
  • Virtual
  • Cloud
  • Appliance
  • Virtual
  • Cloud
  • Cloud
  • Cloud
  • Cloud
  • Appliance
  • Virtual
  • Cloud
  • Cloud
Free Trial
Yes
Yes
Yes
45 days
Yes
Yes
Yes
Yes
Yes
Yes
30 days
Yes
30 days
30 days
Yes

The most popular products in category Secure E-mail Gateway - Appliance All category products

Suppliers Secure E-mail Gateway - Appliance

Cisco

Cisco

Cisco Systems, Inc. is an American multinational corporation technology company headquartered in San Jose, California, that designs, manufactures and... Read more
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Forcepoint Company

Forcepoint Company

Forcepoint, previously known as Websense and Raytheon|Websense, is an Austin-based company owned by US defense contractor Raytheon specializing in... Read more
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Micro Focus

Micro Focus

Micro Focus is uniquely positioned to help customers... Read more
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F.A.Q about Secure E-mail Gateway - Appliance

How Does a Secure Email Gateway Work?

A secure email gateway offers a robust framework of technologies that protect against these email-borne threats. It is effectively a firewall for your email and scans both outbound and inbound email for any malicious content. At a minimum, most secure gateways offer a minimum of four security features: virus and malware blocking, spam filtering, content filtering and email archiving. Let's take a look at these features in more detail:

Virus and Malware Blocking

Emails infected with viruses or malware can make up approximately 1% of all email received by an organization. For a secure email gateway to effectively prevent these emails from reaching their intended recipients and delivering their payload, it must scan every email and be constantly kept up-to-date with the latest threat patterns and characteristics.

Spam Filtering

Believe it or not, spam filtering is where the majority of a secure email gateway's processing power is focused. Spam is blocked in a number of different ways. Basic spam filtering usually involves a prefiltering technology that blocks or quarantines any emails received from known spammers. Spam filtering can also detect patterns commonly found in spam emails, such as preferred keywords used by spammers and the inclusion of links that could take the email recipient to a malicious site if clicked. Many email clients also allow users to flag spam messages that arrive in their mailbox and to block senders.

Content Filtering

Content filtering is typically applied to an outbound email sent by users within the company. For example, you can configure your secure email gateway to prevent specific sensitive documents from being sent to an external recipient, or put a block on image files or specific keywords within them being sent through the email system.

Email Archiving

Email services, whether they are in the cloud or on-premise, need to be managed efficiently. Storage has been a problem for email administrators for many years, and while you may have almost infinite cloud storage available, email archiving can help to manage both user mailboxes and the efficiency of your systems. Compliance is also a major concern for many companies and email archiving is a must if you need to keep emails for a certain period of time.