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Spam firewall

Virtual MX Server *

Have a virtual server managed by us, where you should point your MX, in order to perform improved anti-spam filtering, counting on our DNSBL SPFBL and the SPFBL system, which provides a whole framework for spam filtering and reporting, as well as mechanisms Spam, using custom Brazilian rules. Filter spam before reaching your server with our experienced team, who manages the first Brazilian DNSBL.

Eliminate up to 85% of email traffic

About 85% of emails received by an MTA server are SPAM, only 15% of messages are legitimate messages. Increase the capacity of your email service without spending anything else with infrastructure.

Plug and Play

You do not need to install any software or script on your server. Simply redirect the MX address of the domain to our servers and the filtering starts automatically. Using a Brazilian DNSBL list, which is fed in real time by thousands of users connected through a peer to peer network, the false positive rate is almost zero.

Custom Whitelist and Blacklist

The service uses a brazilian DNSBL, with more complete information from spammers that travel specifically in Brazil. In addition, you can block or authorize any recipient that you want easily by creating your own blacklist and whitelist.


All attachments are verified by clamav-unofficial-sigs. The clamav-unofficial-sigs script provides a simple way to download, test, and update third-party signature databases provided by Sanesecurity, FOXHOLE, OITC, Scamnailer, BOFHLAND, CRDF, Porcupine, Securiteinfo, MalwarePatrol, Yara-Rules Project, etc.

Google Safe Browsing®


All URLs are verified by Google Safe Browsing®, including all redirects are verified and executable files are downloaded for antivirus scanning.

Research and Development

Spammers and hackers try to be always one step ahead. Therefore, we are constantly creating new technologies that allow us to minimize the impacts of new types of attacks.

* Warning! The hosting providers Locaweb and Mandic are not compatible with this type of service because the change to a external MX causes the stop of receiving messages at those providers. The hosting provider KingHost is compatible, but may experience some message loss due to its own filtering.