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Postfix is a free open source mail transfer agent (MTA), a computer program for the routing and delivery of email. It is intended as a fast, easy-to-administer, and secure alternative to the widely-used Sendmail MTA. Formerly known as VMailer and IBM Secure Mailer, it was originally written by Wietse Venema during a stay at the IBM Thomas J. Watson Research Center, and continues to be actively developed today. Postfix was first released in mid-1999.

Web hosting is a most important problem after domain. The website will lose visitors if it is hosted by a bad hosting provider. There are many reason that effected to visitors of the website. This article will go into detail of hosting problems.

There are many tools that let you change your MAC address. Most of them are commercial softwares. Of course, you also find the free or open source softwares on the internet. I searched before but i did not be happy with them. They are not as good as i expected. I need a small software to change my MAC address but it was developed into big software for a small task.