From Aqua Eagle:
Multi Photo Email provides the ability to send multiple photos in one email, saving you the need to send one email per photo. Multi Photo Email works by connecting directly to your email provider's SMTP server and sending the photos as attachments. Select the photos you wish to send, the recipients of the email and an optional subject and body. Multi Photo Email can pick photos directly from your device's Photo Library, import recipients from the Address Book add them manually or choose from recently used recipients, enter an optional subject and body, and has the ability to adjust the photo quality and optionally reduce the size of photos to accelerate the sending process.