Email Security

Email Security

Email Security

Email Security is designed to protect your organisation’s e-mail from illegal access, viruses distributed by e-mail and unwanted e-mails e.g. spam. One may think of an Email Security as a firewall for your e-mail system. It functions as a filter that blocks spam messages and viruses in e-mail messages and puts suspicions content to the quarantine so you can later decide what action to take on each individual affected e-mail message.

At predefined intervals of time users receive e-mail report on e-mails in quarantine e.g. blocked e-mails if any. The user then can view, delete or report as Not Spam, or receive each e-mail in quarantine.

E-mail attachment control functionality checks attachments for viruses, checks compressed attachments, blocks e-mails with attachments of forbidden type and e-mails with attachments exceeding defined size. Blocks document macros.

E-mail content control function allows blocking e-mails by the context in header and body text, wildcards allowed. Use different context rules for selected e-mail addresses or e-mail domains.

Email Security also provides Archiving functionality allowing archiving e-mail messages by e-mail address, e-mail domain name and other parameters.

Rules are used to even better control e-mail processing flow. As rules are executed in the order they appear on the list, it is possible to additionally control e-mail flow by just aligning the rules in the right order. With rules, user can set different actions to be taken on an individual e-mail address, e-mail domain name or user group. Also, user authorization can be used as a rule. When setting rule, one can use wildcards.

User groups are possible to import from AD or other LDAP server and by doing that filtering of non-existing e-mail addresses is done. To further mitigate malicious e-mail messages, domain name DNS check is done for each e-mail message. So if name address is different from one registered in DNS, e-mail is sent to quarantine.


Technical specification

E-mail filtering based on rules:

  • By IP address
  • By e-mail address
  • By e-mail domain
  • By e-mail or email domain groups defined in e-proxy

Anti-spam control:

  • Combination of mathematical Artificial Intelligence methods and heuristics to eliminate spam
  • Antispam control using Bayesian AI filtering methods on the actual email content
  • Easily trainable by users anti-spam database with simple forwarding “Spam/Not Spam” method
  • Retraining possibility when necessary
  • Customer specific heuristic rules based ’email firewall’ policy
  • Global, group-based and individual email-account policy granularity
  • Incoming e-mail control by domain
  • Outgoing e-mail control by senders e-mail address
  • Control by groups using parameters mentioned above
  • System-global anti-spam filters
  • Dedicated anti-spam filters for selected user groups or domains
  • E-mail with multiple addressees is Quarantined if contains non existing e-mail addresses

Supported protocols:

  • Simple Mail Transfer Protocol (SMTP)
  • SMTP authorisation
  • TLS support

Compatibility with third-party e-mail systems:

  • MS Exchange
  • Office 365
  • Lotus Notes
  • SENDMAIL, Postfix and other UNIX based systems
  • Novell
  • Mercury
  • NT e-mail servers etc.

Log and audit functions:

  • Log of selected system events
  • Statistical reports including virus TOP list
  • Log of configuration change
  • System administrator action log

E-mail attachment control functionality:

  • File and attachment antivirus check
  • Unpacking and inspection of compressed attachments at multiple levels
  • Supporting following archive formats: zip (zipx, jar, xpi, odt, ods, docx, xlsx, epub), 7z, arj, rar, cab, and many others
  • Blocking of e-mails or attachments by file type (EXE, CMD, VBS, JS, Office macro, etc.)
  • Blocking of e-mails or attachments by pre-defined size
  • If selected, blocking of encrypted attachments or attachments impossible to unpack (protected by password)

E-mail content control function:

  • Content control by defined context in e-mail headers
  • Content control by defined context in e-mail body
  • Content control by defined word, phrase or template (using wildcards)
  • Quarantine for filtered e-mails
  • Global system-wide content control settings
  • Content control for selected users or domains

Antivirus functionality:

  • Antivirus control with warning messages to all parties (sender, receiver, admin)
  • Antivirus control for packed or archived e-mail attachments
  • Integration with various antivirus products
  • Possibility to use more than one antivirus engine for all the traffic
  • Automatic antivirus database update
  • Quarantine for infected e-mails

Warnings about events:

  • Automatic warning to sender, recipient and admin about e-mail control event like virus found, “bad” content etc.
  • Warning message in pre-defined free text format

Quarantined e-mail report and search allowing to:

  • Receive e-mail
  • View e-mail
  • Delete e-mail
  • Report as Not Spam

Optimisation and settings:

  • Queue control of received/to be sent messages
  • Configurable number of simultaneously processed messages
  • System resource control and preventive warnings if system runs low on resources

Archiving of e-mail messages:

  • By address
  • By domain
  • By user group
  • By direction of communication

Management functions:

  • Web interface
  • Multilanguage support with ability to switch between languages at any time
  • Connection between admins console machine and e-proxy server is encrypted using SSL protocol
  • Command line support
  • Integrated management with management of other Ugunssiena products
  • New configuration is applied to the system in real time, no restart is needed

System expansion:

  • Modular design. Separate modules for e-mail security system, the antispam filter, etc. It is possible to use only a few or all of the modules available
  • Selection of cryptographic algorithms for use in system according to customers needs
  • Redundancy by deploying multiple hardware units

Antivirus compatibility

E-proxy works with all main antivirus vendor products. Typically we recommend using products of one of the following vendors:

  • Clam AV (freeware)
  • Sophos
  • Kaspersky Lab

Authentication and encryption with certificate server:

  • It is possible for users to set up own PKI infrastructure (generate key pairs, sign X.509 certificates and revoke them)
  • Users may use system generated digital certificates for e-mail encryption