Their mail servers are usually too busy to respond to these requests to resend emails. Most spammers perform huge runs of emails as part of their spam campaigns. The time delay in responding to that request is a good indicator of whether the email is genuine. Other methods include greylisting: The practice of responding to the email server from which a message has been sent and requesting the message be resent. A Bayesian Analysis is used to check the contents of emails for spam signatures, such as the use of non-standard characters and other idiosyncrasies. A cloud spam filter for Microsoft Exchange will first check the sender of the email against a global blacklist of known spammers.Īn advanced cloud spam filter for Microsoft Exchange will also perform a host of other checks to determine whether emails are genuine. How Does a Cloud Spam Filter Detect Email Spam?Ĭloud-based spam filters use a number of different mechanisms to assess incoming emails to determine if they are genuine and should be delivered or if they are spam and should be quarantined. As an added benefit, using a cloud-based spam filter will ease the load on your organization’s email server.
#Microsoft spam filter service software
All emails are then routed through the service provider, whose software assesses each email to determine whether it is spam and is free from malware. When a cloud spam filter for Microsoft Exchange is used, the MX record of the inbound server is replaced with the MX record of the provider of the spam filtering service. The email is then sent and picked up by the recipient’s inbound email server. The outbound email server contacts a DNS server to obtain the address, which replies with an MX record. The server must then find the address to ensure that email is directed to the correct recipient. When an email is sent by an employee through his or her email program, the message is passed on to the organization’s outbound email server. How Does a Cloud Spam Filter for Microsoft Exchange Work? Once a subscription to a cloud spam filter for Microsoft Exchange has been purchased, all that is required is for a small change to be made to the mail exchanger (MX) record and the service to be configured: A process that takes just a few minutes. With a cloud-based solution there is no need to purchase any additional hardware and no software needs to be installed. In contrast to hardware-based spam filters, a cloud spam filter for Microsoft Exchange can be configured and managed from any device with an Internet connection using a web-based control panel.Ī cloud-based spam filter for Microsoft Exchange offers a number of other benefits over hardware and software-based spam filters. Exchange Anti Spam and Anti Malware ProtectionĪ cloud spam filter for Microsoft Exchange can prevent spam emails from being delivered to end users and will greatly enhance security by blocking phishing emails and other email-borne threats.
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