The function of mass emailing software is to send emails to a large number of people known as “recipients”. These recipients usually join your email list using a subscription web form before you can start sending email messages to them. By just clicking on your “unsubscribe” link, your recipients may leave your email list at any moment. You can absolutely use any email program including your regular email client such as Mac Mail or Microsoft Outlook in sending mass email, but there is no point in that, and Iâ€™ll explain you why. Other things that mass emailing software can do aside from sending mass messages are it can automates subscription, unsubscription, and remove bad addresses. Unlike regular email program, it can allow you to personalize your messages, and reference recipient personal information through macros. Standard Address Book which is built into the operating system can work with Mac Mail, Eudora, Microsoft Outlook, Windows Mail and other known email programs. It is not designed for holding millions of recipients with thousands coming in and out every day and it’s address book has a limited functionality. Good thing that you can have a high-performance database that you can also handle easily such as mass emailing software. Another great option that it has for you is a much better import and export functionality so you can move your existing email lists in and out easier. Many Mass emailing software is for sale on the internet, but you can actually find them all as good products. And if you are looking for one, you have to make sure that it does what you need and does it well. 30-day trials usually exist in most of these packages, and just before you buy them, you can thoroughly test the one you want to own. Another thing to consider is operating system you use. Mac and PC has distinct mass emailing software products, and if you use both, you may need to get 2 different versions: one for Mac and another one for PC. I use 2 different mass emailing software packages at the same time because I own Mac Book Pro laptop with Mac OS on it, and my desktop computer is a PC with Windows. I am using Mac Mass Mailer for my Mac Book Pro laptop, and Advanced Emailer for my Windows desktop PC. The said products are really great, and they do the job well.