We're having problems with open relay on Microsoft Exchange Server 2000. We tried to shut down SMTP, clean out queues, turn off relaying, etc., but nothing worked. For a quick fix, we set up a ...

We have people that travel and I've been annoyed a lot with some hotels using ISPs that block SMTP port 25 traffic. The solution is having to talk the users through changing the default SMTP server ...

Open mail relays—e-mail servers that allow third-party transmission of messages—are a significant contributing factor to the volume of unsolicited e-mail currently flying around the Internet. Spammers ...

This list is a companion piece to the Secure Web server installation portion of SearchSecurity.com's Intrusion Defense School lesson on Web attack prevention and defense. Check out the companion ...

I have a mail server up and running using Postfix. <P>I know that open realys are very bad news, however I have NO idea where my users will be logging into this from. They will not all be in a close ...