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WinGate has a number of available options for SMTP message reception. These include various limits, as well as extra checks made for mail received from untrusted sources (i.e. unauthenticated, or received on an untrusted interface). The Open Relay Detection uses ORBS-style DNS RBL requests to verify sending servers. Spoofed-address blocking uses a DNS-based mechanism to determine whether the sending server is legitimately entitled to be delivering mail from the domain it claims to be. This allows for a great reduction in the amount of received unsolicited email (SPAM).