Active Internet’s SpamAV™ is a SMTP proxy server based spam filter that sits between the internet and your mail server. Your Outgoing and MX records are pointed at our server.
Incoming mail is accepted from the open internet, checked for spam, and is then delivered to your existing SMTP mail server. During this process Active Internet’s SpamAV™ will flag spam mail in the subject line and add a filtering report to spam mails according to your configuration.
The Active Internet’s SpamAV™ Proxy Service accepts incoming SMTP connections on port 25 (or any other port you select) and forwards all requests to your existing mail server while scanning incoming mail for SPAM. This way, Active Internet’s SpamAV™ SMTP Proxy supports the same SMTP extensions your mail server supports, and will accept mail only for the recipients your mail server will accept. Thus, if your existing mail server is configured correctly, the SMTP Proxy cannot be misused e.g. as an open SMTP relay.
When a Spam mail is found by the SpamAV™ engine No Spam Today will flag the mail in the subject line, shows the filtering report in the mail body and attaches the original mail. This ensures that spam mails are not opened and viewed unintentionally.
Based on the flag in the subject line all spam mails can then be removed or collected using rules in your mail server or the mail clients.
Active Internet’s SpamAV™ SMTP Proxy can also be configured to reject supposed spam with a 550 error response. In this case, the recipients will still receive the supposed spam mail (flagged as spam with a SpamAV™ filtering report), but the sender will receive a mail delivery failure notice. |
