Salesforce Mass Email – How to Send and Test

Salesforce supports mass emailing through Salesforce Classic’s Mass Email tool, Lightning Experience’s Send List Email feature, and custom Batch Apex automation, allowing users to segment Contacts, Leads, Campaign Members, or internal users, apply filters, select templates, personalize messages with merge fields, schedule sends, and monitor campaign status. Native mass and list email are generally limited to 5,000 external recipients per licensed organization per day, while Developer and trial organizations are limited to 10, with recipient counts rather than message counts determining usage; attachments are capped at 25 MB, and template size and availability restrictions also apply. The guide emphasizes testing before large sends, recommending Mailtrap Email Sandbox to route organization-wide outbound Salesforce email into a protected environment where users can inspect rendered content, headers, merge-field output, and spam scores without contacting recipients or harming sender reputation. For higher-volume requirements or enhanced deliverability, analytics, scalability, and separation of transactional and marketing email reputation, it describes connecting Salesforce Email Relay or Apex callouts to Mailtrap’s Email API/SMTP, while noting the added integration, cost, and third-party dependency considerations.

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