Mail Proxy

Mail Proxy
Anti-Spam and Anti-Virus Protection

Business success depends on electronic communications which rely on your network connections. Spam and computer virus attacks can cripple your network resulting in lost productivity, corrupted data, leaks of confidential data, and missed business opportunities due to lost or delayed email communications. GTA's Anti-Spam and Anti-Virus solutions allow you to take back control of your email. Expand the capabilities of GTA's basic Mail Proxy email features with the Anti-Virus feature and the commercial-grade subscription, Anti-Spam - powered by powerful Anti-Spam technology. Together these mail features fight business nuisances by providing a level of defense at the perimeter with a gateway level solution. Integrated into the GB-OS, there is no need to purchase additional hardware or install software on desktop stations to activate the Anti-Virus feature or the Anti-Spam subscription based option.

Mail Proxy Flow Diagram

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Anti-Spam
Protection You Need

GTA's Anti-Spam option offers customizable spam blocking for GTA's firewall email proxy. Simply utilize the email proxy on your GTA firewall for your SMTP email, and activate the Anti-Spam subscription - no software to download and install.

The Anti-Spam Greylisting settings offer enhanced email filtering before the email reaches the email server. Greylisting is designed to protect users from spammers that use fire and forget email applications, which are created to send spam messages, but never attempt to retry delivery if the first attempt fails. Greylisting significantly reduces the number of emails which are scanned by spam rules, so email processing is more efficient. With a two pronged attack on email, spam is virtually eliminated while legitimate email is efficiently processed and received at the users inbox.

GTA's Anti-Spam option uses technology that reviews each message in fractions of seconds by a spam identification engine utilizing more multiple algorithms and rules to identify spam with a high accuracy rate while preventing false positives. Mechanisms used include text and header analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases to calculate one final spam probability score. The Anti-Spam subscription option automatically check for rules updates to ensure the accurate weighting against the most up-to-date rules for formulation of the spam probability score.

SpamScore rankings range from 0-100 and are utilized by the Anti-Spam subscription to rank emails as spam (confirmed) or probable (suspect). Firewall administrators can establish thresholds based on SpamScore for confirmed and probable spam to fine tune the control of the spam filtering to match corporate needs. Once Anti-Spam thresholds have been established, administrators may choose to accept, reject, tag or quarantine confirmed or suspected spam emails.

When used in conjunction with the Mail Proxy's basic features, a corporation can virtually eliminate spam emails delivered via the firewall email proxy.

Key Features


  • Detects and blocks spam emails in real time
  • Customize black lists and white lists by email name, domain or IP address
  • Real-time Blackhole List (RBL)
  • Delete, tag or quarantine emails based on your spam category criteria
  • False positives minimized through SpamScore technology
  • Automatic anti-spam rule updates
  • Logging & Reporting
  • Database rules updates scheduled every 15 minutes
  • Available for all GTA Firewalls running a supported GB-OS version
Anti-Virus
First Line of Defense

GTA's Anti-Virus feature is the first line of defense against virus attacks. Activating the Anti-Virus option through GTA firewall's email proxy for SMTP email means real-time scanning for viruses and other malware is done at the perimeter before they reach your network. By employing highly effective and respected open source virus definition lists, Anti-Virus users receive the most complete and inclusive virus and malware protection available.

When using the Anti-Virus feature, each email message is quickly scanned and its contents reviewed against a growing database of over 200,000 open source and proprietary virus definitions that includes malware definitions for classic viruses, network worms, trojan programs, DoS and hacking tools, flooders and virus writing tools. Even unknown viruses are detected and prevented using proactive virus detection mechanisms, providing sought after zero-day protection. If a virus is detected by the Anti-Virus, the contents will be disinfected when possible.

GTA's Anti-Virus feature provides flexible implementation to match network bandwidth and corporate security policies. Network administrators can customize how emails are handled with choices to accept, reject, tag or quarantine emails with known viruses. Email containing viruses can be tagged for easy recognition by the end users, who can then choose to filter tagged messages using email rules. To optimize performance, email and attachment size limits can also be established.

The Anti-Virus feature automatically receives periodic updates of virus definitions to ensure effective and accurate virus protection. As new virus definitions are discovered, your GTA Firewall UTM Appliance is updated to provide the best possible protection against email based virus attacks.

The Anti-Virus facility is available as a standard part of GB-OS. The facility is provided with a standard set of anti-virus signatures. GTA Firewalls that have a current GTA support contract will receive automatically signature updates.

Key Features


  • Detects and eliminates computer viruses in real time
  • Scans incoming attachments for viruses
  • Tag, quarantine or delete emails identified as containing virus
  • Database rules updates scheduled every 15 minutes
  • Customizable parameters for handling emails with recognized viruses
  • Automatic update of virus signatures

Mail Proxy Subscriptions

ETAS00-0300U
GB-300, Mail Proxy Anti-Spam Subscription, 12 Months
ETAS00-0AR6-12M00
GB-820, Mail Proxy Anti-Spam Subscription, 12 Months
ETAS00-0850U
GB-850, Mail Proxy Anti-Spam Subscription, 12 Months
ETAS00-0AS4-12M00
GB-2100, Mail Proxy Anti-Spam Subscription, 12 Months
ETAS00-0AF1-12M00
GB-2500, Mail Proxy Anti-Spam Subscription, 12 Months
ETAS00-2600A
GB-2600, Mail Proxy Anti-Spam Subscription, 12 Months
ETAS00-0SP2-12M00
GB-Ware Restricted, Mail Proxy Anti-Spam Subscription, 12 Months
ETAS00-0SP3-12M00
GB-Ware Unrestricted, Mail Proxy Anti-Spam Subscription, 12 Months
ETAS00-0SP4-12M00
GB-Ware Enterprise, Mail Proxy Anti-Spam Subscription, 12 Months