To help organize your email contacts, you can use your email client's address book.
What is an Address Book?
An email address book is used to store your personal contacts. This includes not only their email address, but also other information such as their phone number, physical address, and more. This allows you to easily access any information that you need whether you use the address book for your friends or for your business. Think of it as a electronic version of the address book you may use around the house to keep track of phone numbers, but in this case it is used primarily to store your contact's email addresses.
Why should I use an Address Book?
Using your address book will make it much easier to manage of your email contacts. By using the address book you will not have to remember someone's email address or have to ask each time, since it will be stored right in your email client. Also most address books allow you to set up mailing lists so you can easily send an email to more then one person at a time without physically typing out every email address.
How do I manage my Address Book?
To assist you in making these modifications we have articles in our Knowledge Base for many of the most popular email clients: