Many companies and ISPs have been blocking the receipt of this mail from known sources, as it is possible to deny access to a sending machine with a firewall or some other method. IMail Server protects your system against this type of abuse in two ways. First, IMail Server allows administrators to configure the system to only accept mail that originates from local users or that is destined for local users. Second, IMail Server allows you to define the systems from which you never want to receive mail, allowing administrators to block mail from known sources of spam mail. If you like this site, tell your friends.
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