If you need to send the same email to multiple people, consider using Google Labs' Canned Response tool. This feature allows you to save specific emails in response and send them repeatedly, without the need to manually copy and paste them.
Step
Method 1 of 3: Enabling the Recorded Responses Feature
Step 1. Click the cog icon in the top right corner of the Gmail window
Step 2. Click Settings.
Step 3. Click the Labs tab
Step 4. Select Search for a lab, then enter Canned Responses in the search bar
Step 5. Click the Enable button.
Step 6. Click Save Changes.
Method 2 of 3: Creating Recorded Responses
Step 1. Click the Compose button in the upper-left corner of the Gmail window
Step 2. Write the email you want to use as a response
You can write emails manually, or copy and paste the contents of other conversations.
Consider marking any parts of the email that may need to be changed, including the name and date
Step 3. Click the arrow next to the trash can icon, at the bottom of the e-mail compose box
Step 4. From the menu that appears, click Canned response, then select New canned response
Step 5. Name the response an easy-to-remember name, such as "Invitation" or "Thank You."
Method 3 of 3: Using Recorded Responses
Step 1. Click the Compose button in the upper-left corner of the Gmail window
Step 2. Click Canned responses.