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Update of the POP3/IMAP4 server

This update fixes a critical security issue. An attacker was able to read protected information or even execute their own program code without authentication.

Improved macro detection in email attachments

Now macros will also be recognized if office documents have been mailed directly (not as attachment) or if they are attached to an attached email.

New categories for the commercial URL filter

New categories have been added to the commercial URL filter: Arms and weapons, DNS-over-HTTPS, Movies and series with questionable legal status, Education, Restaurants and recipe sites, Buy or rent a place to live, Stock markets and trading systems.

Adding new certificates to the keyring

For each certificate the corresponding root and intermediate CA certificates have to be stored. Previously the CA certificates had to be uploaded manually for each new certificate. Now the certificates of well-known root CAs will be added automatically. Certificates of intermediate CAs will be cached upon the first upload and added automatically when required by subsequent certificates. Adding multiple similar certificates as required by the S/MIME gateway feature becomes much more convenient in this way.

Minor bugfixes and improvements


DEFENDO forces a collection of best-of-breed security modules like firewall, VPN, proxies, virus scanner and anti spam system to interact for one purpose:
To be protected from all online threats and unwanted contents like malicious code, spam and hacker attacks.


Each IT scenario is different. The DEFENDO product family will adapt precisely to your demands.
DEFENDO applies for simple internet connections of small companies, for headquarters / branch office WANs, as well as for complex multi-tiered firewall systems.

More good reasons

  • No backdoors
  • More than 15 years of Internet security experience
  • Award-winning product
  • Support by our development engineers
  • Reseller loyalty
  • Made in Germany