you are probably connecting to the local smtp port on the machine, and it's configured to not allow any external relaying (including from it's own ip addresses). either get the ip added to the relay ...

I posted here some time back about linux email servers. I now would like to ask about building a mail relay for exchange 2003. It seems that the two major mta's for linux are postfix and qmail. I ...

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 ...

One of the greatest features of sendmail is the extreme flexibility it provides the administrator. This is also one of its worst features, the reason being that it is so often misconfigured. Usually, ...

The Meridius Mail Relay is a rackmountable (1U) Linux-based mail appliance. It is designed to relay mail in order to protect your internal mail server and filter out spam. The Meridius is placed on ...

These days, e-mail is so essential to the way we work that even the slightest hiccup in the flow of messages can ruin your day. You don’t have to put up with a cluttered, creaking inbox or attachments ...