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relay configuration

About this tag
This tag covers discussions about SMTP relay configuration on Windows servers, particularly in the context of email security and spam prevention. A common issue involves exploited SMTP relays where unauthorized users send spam through the server. Users explore settings like restricting relay to local users or disabling it entirely, and balancing security with the need for SMTP authentication for legitimate email sending from external websites. Topics include configuring relay permissions, understanding how open relays can be abused, and adjusting authentication timeouts to improve security without breaking functionality.
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    Questions about exploited SMTP relay

    Hello, I'm using SmarterMail on Windows Server 2008. I changed the SMTP relay from "Nobody" to "Only local users" and in last 2 days I had a large number of outgoing spam messages sent from my server (close to 6.000). This has happened in the past, and setting SMTP relay back to "Nobody" has...
    • batric
    • Thread
    • authentication configuration domain email email configuration email relay email sending learning resources relay configuration relays security server management server security smartermail smtp smtp auth spam windows server
    • Replies: 4
    • Forum: Windows Server Forums
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