Email Marketing Courier is software for targeted bulk email marketing and personalized mass mailing using multiple mailing lists and plain-text or HTML message templates. It uses multiple SMTP accounts, sending throttling and delivery schedule to mass-send email messages in a fast and efficient way. The customer database can be customized by adding new data fields. Multiple mailing groups can be used for different mass mailing purposes. Macros can be used to reference customer database fields in message templates and to personalize the final email messages.