• Currently supports 3 template engines: tera, handlebars and liquid
• Automatically attaches all your HTML resources to the SMTP message
• Provides you the ability to aggregate multiple E-mails of the same subject and recipients, into a single E-mail with accumulated context
• Supports multiple SMTP connection types: NOAUTH, TLS and STARTTLS

OSA-Mailer uses asynchronous approach for sending E-mails, sacrificing realtime notifications in favour of increasing feature capabilities.

This enables OSA-Mailer the merge of multiple E-mails context of the same recipients, craft beautiful and sophisticated E-mails, using rendering engines, and some other future ideas that are on the table (such as timed or conditioned E-mail messages). It also enables resending E-mails in case of an error, or using other mitigation methods.

1. An external tool is creating and writing a formatted E-mail send requests (JSON file) into the outbox directory (refer to the send_email_request python scripts for examples)
2. The OSA-Mailer service is pulling every X configured seconds for new E-mail send requests found within the outbox directory
3. OSA-Mailer calculates an E-mail ID for each request base-off its email section and effectively merging dynamic context values
4. It then composes an SMTP message using the provided HTML template, rendering it with the chosen rendering engine against the merged context, allowing for a dynamic E-mail creation, while automatically loading all related resources (images) used within that HTML template
5. It sends out the final SMTP E-mail message, using the configurations within the osa_mailer.cmd file

Try the rendit CLI tool

This is still an MVP (Minimal Viable Product) and there is still work to be done and features to be added. Features may be added or removed later with no notice (but typically documented in the changelog notes of each release)

MIT