1. plural of emailer; people or organizations that send emails, especially in bulk or as part of a marketing campaign
Usage: informal; commonly used in business and marketing contexts
2. software or tools designed to send emails automatically or in large quantities
Usage: informal; technical context

Examples

• The company hired several emailers to manage their customer outreach campaigns.
• Spam emailers often use fake addresses to avoid detection.
• Our marketing team uses automated emailers to send newsletters every week.
• Professional emailers must comply with anti-spam regulations.
• The emailers in our department handle all promotional communications.
• Some emailers allow you to schedule messages for later delivery.