Even criminal hackers want to protect their intellectual property, and they've come up with a method akin to copyrighting - with an appropriate dash of internet thuggery thrown in.

If you're running a web application with user registration, you may need to have users or administrators receive email from the application. When you just need to send outgoing email and don't need to receive, it&'s easy to set up Postfix to do this for you. You can even set the "from" header so that replies will go to your own email account. This how-to was tested on Ubuntu 8.04 LTS server.

This tutorial explains how you can configure monit to send alert messages per SMS to your mobile phone when a service fails. Because monit can send only emails but not SMS, we will use an email-to-sms gateway where monit will send its emails to, and the email-to-sms gateway will convert the emails to SMS messages.

When you start doing it though, you soon find out that the hardest, or at least lest documented task, is not how to send email, or how to block spam. It is how to make sure that the email you send is always accepted by other sites, that is how to find out if your email server looks like a spam source.

When the need arises to send email from the command line, many folks first think of the mail(1) command.

Today, we live in a world of rapidly diminishing privacy. If you use your employer's email system, it is possible that every message you send or receive is logged and intercepted without your knowledge. This may have unintended or even disastrous consequences if an intercepted email message contains sensitive personal information.

Everyone is not as lucky as having a full fletched email client like thunderbird or kmail to send mails. There is one unlucky group known as system administrators who have to send the mails either through the command line or a script running on the remote server.

Did you know that Email is sent in clear text over the Internet? Unless you take steps to secure it, anyone who intercepts a message can easily read it. It’s also really easy for someone to send an email that looks like it came from you. The open source solution for this problem is called GNU Privacy Guard.

Is it possible to send an email from a host that has no email client software installed? As long as you have netcat, of course it is!