I've occasionally found it useful to set up reminders to be emailed to myself on a regular basis. The most straightforward tool to use for this is cron with mail.

Wouldn't it be useful if your computer could email you? I'd like to be notified by email when my server is in trouble, but I don't want to run my own mail server. sSMTP is perfect for this; it's a simple way to send email from your system to an SMTP mail server, like Gmail's.

Juliet Kemp is a Mutt (powerful text email client) user, even in these modern times, and shows us how to use old-school Mutt + SSH for security on the newfangled Android G1.

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

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.

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.

Having a notification when new email arrives can be nice and really useful if you're waiting for an important message. But if you're using a desktop email client or maybe a third party webmail service, you might not want to run a big client application or have to keep checking that tab in Firefox to see if new mail has arrived.

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.

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.