Replacing sendmail with esmtp

esmtp is a drop-in replacement for sendmail. If you're on DSL and everyone in the world blacklists your IP, you can set up esmtp with your DSL-provided SMTP information and continue sending mail as usual.

Install

Configure

Edit /etc/esmtprc. You'll probably just need to change hostname, username, and password.

Link it up

Note: this will lose all mail to *@localhost and *@hostname, as these will now be redirected to your SMTP provider and either bounced (unknown user or unknown host) or possibly delivered to users of the same name on that system when @localhost is used(?).