1. a person or organization that sends emails, especially in bulk or as part of a marketing campaign
Usage: informal; commonly used in business and marketing contexts
2. a software tool or service designed to compose, manage, and send emails automatically or in large quantities
Usage: informal; technical

Examples

• The marketing team hired a professional emailer to manage their newsletter distribution.
• Our company uses an emailer platform to send promotional messages to thousands of customers.
• She works as an emailer, crafting and scheduling messages for various clients.
• The emailer automatically sends confirmation emails to new subscribers.
• We switched to a new emailer service that offers better tracking and analytics.
• As an emailer, he was responsible for maintaining the company's mailing lists.