1. If you are going to automatically add users after a sale transaction, make it clear on the order form, and give customers the option to opt out.

2. Provide an opt-out link at the bottom of each email.

3. Send as few message as possible. Once a month is reasonable. Once a week may be overkill. Once a day will land you in spam folders.

4. Make sure your opt out script actually works. I cannot tell you how many times I have unsubscribed from some lists only to be added again.

5. Just because someone is involved in an organization does not give you the right to add them. As someone who works in publishing, I have been added to numerous lists, because they assume I am interested in what they have to say.

Finally, always make sure your message are relevant. People who actually do sign up for your gardening mailing list do not want messages about iPhones. Stay on topic and be respectful.

Amazon S3 is a storage service provided by Amazon.com. It is part of Amazon’s cloud computing offering, and it used by all sorts of individuals and businesses. Although anyone with a Linux server can theoretically backup their server manually to S3 storage, it helps to have a tool to do it for you.

S3cmd is a command-line S3 client for Linux. It can be used with cron to create automated backups of your data.

“S3cmd is a command line tool for uploading, retrieving and managing data in Amazon S3. It is best suited for power users who don’t fear command line. It is also ideal for scripts, automated backups triggered from cron, etc.”

S3cmd is available for download from the project’s website in both source code packages and binaries for major Linux distributions. It is free and open source software released under the GNU General Public License.

Source: S3cmd