MailCleaner Anti Spam for ISP / ASP

MailCleaner is the best choice for ISPs and ASPs who aim to offer their clients a quality antispam/antivirus filter.
Many ISPs who favor Open Source solutions have adopted our product for a variety of reasons:

• Multidomain
  Easily manage thousands of domains per server
  
  
• Config by domain
  Independently configure each domain: Destination server, authentication method, quarantine preferences, default language, web template, etc.
  
  
• SMTP callout
  Allow each domain the possibility to enable SMTP callout, a technique that immediately rejects all messages sent to invalid addresses
  
  
• Mail routing
  Choose a different destination for each domain if so desired
  
  
• Granularity of admin permissions
  Delegate the admin work over many accounts: For each domain, multiple administrators with varying permissions can be created, e.g., allowing one administrator to change domain defaults, while another can only access user quarantines
  
  
• Install parallel filters
  Install any number of MailCleaner servers in parallel to handle large volumes of email traffic
  
  
• Robust redundance
  Protect your filtering infrastructure by leveraging the redundance of servers installed in parallel
  
  
• Prices adapted to service resale
  Take your pick of one of our many license pricing models, based on volume or on domain count or per server, that are tailored to the needs of ISPs and ASPs
  
  No setup fee! Simply request a license number and start providing filtering services to your customers within an hour!
  
  Pricing per domain, per server, or by volume
  The first 30 days are free!

More product info.
Also see the Admin interface demo.