This category is for services that block spam e-mail. These services are generally web-based, and may or may not be customizable.
An email security company offering hosted spam and virus protection and a scanning engine especially for OEMs. Also offers Exchange hosting.
Anti-Spam SMTP Proxy implementing platform independent email filtering services.
ASSP Deluxe for cPanel
A set of php scripts to install and configure ASSP on a cPanel server.
An open source email content filter application. Clapf is a modular statistical antispam application with an interface to popular antivirus programs.
Managed enterprise quality spam and virus filtering service.
Hosted service filters spam and viruses before they reach your network. This type of filtering can increase security, save bandwidth and reduce the load on your email server.
UK based provider of email filtering, email monitoring and centralized administration services for business users.
Distributed Checksum Clearinghouse
System of clients and servers that collect and count checksums of email messages in order to detect and filter bulk UCE.
Domain-based Message Authentication, Reporting and Conformance (DMARC) is an email authentication protocol designed to detect and prevent email spoofing.
Automates filter, mailbox, and nickname creation for Eudora Macintosh. Filters on more than 1,000 spam characteristics.
Services to stop spam, viruses and control web access. Firewall installation and setup to prevent server/network security breaches.
The Email Laundry
Spam filtering service to block spam and viruses by domain.
Providing a service to temporarily reject mail directed at low priority servers.
Free tools to deploy SPF, DMARC, MTA-STS & TLSRPT. Email security & authentication services for businesses.
Hosted email filtering. Blocks spam and viruses for an entire domain before reaching your network. Solutions for corporate or personal email protection. A 30 day free trial is offered.
Messaging, Malware and Mobile Anti-Abuse Working Group comprised of hundreds technology companies around the globe.
Anti-spam software for business. A gateway installed between mail infrastructure and the Internet. It offers professional protection against viruses and spam. Exists as software edition or cloud based solution.
A hosted spam filter and managed email security service. Also offering Hosted Exchange and web security services.
Australian company offering a managed service with protection from viruses, spam, malware, phishing and unwanted content.
Offers protection against spam, combined with personalization and privacy for individual email users.
Mailwall Remote from Omniquad Ltd.
Cloud-based email filtering solution for business and enterprise customers.
Provides a hosted anti spam filtering service. The service helps eliminate spam and junk mail. Suitable for organizations ranging from 1 to 1000 users.
UK Company offering a service to remove viruses and spam mail before they reach the recipient.
Enables VARs, OEMs, and ISPs to provide world-class managed email security services.
Managed anti-spam, virus and malware protection.
NoSpam Mail Protection
Hosted email security and continuity solution compatible with any email system. Stops junk mail, viruses and acts as a mail server backup.
Online Spam Solutions
Managed spam blocker and filtering service for small businesses. Blocks spam and viruses through MX redirection. A 30 day free trial is offered.
Managed email filtering. Blocks spam, phishing and viruses before they reach your network. Solutions for corporate, personal and children's protection. Hosting and free trial available.
Open-source automatic mail classification tool using Bayesian statistical methods.
Managed service which filters spam, viruses and malware. Supports POP, IMAP and SMTP.
RMX - SMTP anti-forgery protocol
Filtering protocol verifying the sender address through authorization records made available in DNS to prevent address forgery.
Offers a free (ad supported) and enterprise email security solutions, to blocks spam, virus and malware.
Managed spam service offering anti-spam and anti-virus filtering technologies.
Sender Policy Framework (SPF)
Framework for publishing information through DNS describing a list of ip addresses allowed to send emails from a specific domain.
New Zealand based spam filtering company protects your systems at the network layer with no software or hardware to install.
Mobile email filtering service for POP3. Filters your view of your mailbox so you only see email from important senders on your mobile device.
Email management solution that provides full control over security and usage of corporate email systems.
Spam Arrest, LLC
POP3 service that blocks spam using sender verification methods.
Spam reporting service.
Spam Filtering for Mail Exchangers
Document offers detailed discussion on how to filter junk mail in incoming SMTP transactions.
Bayesian spam filter download for Outlook. Supports IMAP, POP3, HTTP, and Exchange mailboxes.
Spam Safe Mail
Network email scanning and filtering service that removes junk emails at the network level before they are delivered to your mailbox.
A fully managed domain-wide email spam filter service hosted in the cloud. No hardware or software to install.
Swedish company filters individual POP3 and IMAP accounts as well as entire domains. No software installations required. Offers a 30-day trial.
Protects your e-mail system and network from spam and other malicious communications.
SpamFilter for ISP
Proxy software for incoming mail.
Domain wide spam and virus filtering with no per-email address fees. Hosted spam filter with nothing to install.
An email filtering service for businesses or individual domains. 30 day trial offered.
Anti spam solution for SMBs, ISP and education sector. Blocks spam, viruses, trojans, spyware and malware with a low false positive rate.
Styopkin Antispam Scanner
Removes unwanted email messages from your email server.
South African company providing an E-mail gateway that sits in the cloud between your ISP and internal mail servers. The service filters and removes spam / virus mail before it arrives at your server.
Collaborative spam filtering network allowing users to report and filter out matching spam.
Dutch company offering managed hosted or dedicated virus and spam filtering, works through mx redirection. Free 30-day trial is offered.