Sending Emails with Ruby

Ruby applications can send transactional email through Rails’ built-in ActionMailer, the standalone Mail gem, or the dependency-free Net::SMTP library. ActionMailer is presented as the conventional Rails option, supporting mailer classes, templates, multipart messages, attachments, recipient lists, SMTP configuration, and immediate or background delivery, while Mail provides similar message composition and delivery features independently of Rails. Net::SMTP is described as a minimal alternative better suited to specialized contexts such as IoT or serverless environments because developers must manually construct headers, MIME content, HTML bodies, multipart boundaries, and encoded attachments. The material also outlines SMTP configurations for Gmail and promotes Mailtrap as an email delivery platform offering API and SMTP integrations, Rails-compatible delivery methods, delivery logs, monitoring dashboards, alerts, and reporting.

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