Send Email Node

The Send Email node is used to send emails via Microsoft 365 using a configured service account. This node can dynamically resolve and send to multiple recipients, supports saving the email as a draft, and optionally replies to an existing email thread using an Email ID.

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🧩 Node Type

task

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📝 Inputs

Label	Type	Required	Description
Email To	text[]	✔️	List of email addresses to send the email to. Can include placeholders.
Subject	text	✔️	Subject line of the email. Can include variable placeholders.
Body	text	✔️	The email body content (HTML or plain text). Supports placeholder injection.
Save as Draft	boolean	❌	Optional flag to save the email to drafts instead of sending immediately.
Email ID	text	❌	If provided, this will be used to reply to an existing email thread.

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📤 Outputs

This task does not produce any new output variables, but it sends or drafts an email and updates the task status.

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⚙️ Behavior

• Uses Microsoft service account credentials (ThirdParty-Microsoft) to authenticate.
• Replaces all placeholders in the input fields using the runtime data dictionary.
• Handles single or multiple recipients:
  • If a field resolves to an array of strings, all are included as recipients.
• Deduplicates recipient list.
• If Save as Draft is set to true, the email is saved instead of sent.
• If Email ID is provided, the email is treated as a reply in the thread.

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💡 Example Usage

Field	Value
Email To	[ "user1@example.com", "{managerEmail}" ]
Subject	Project Update for {ProjectName}
Body	Hello team, <br/>Please find the latest updates for {ProjectName}.
Save as Draft	false
Email ID	(Optional) AAMkADY1ZDExY...AAA=

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🛠️ Implementation Notes

• Email sending is performed using the EmailService.SendEmail() method from the Microsoft REST service integration.
• The PropReplacePlaceholders method resolves any tokenized variables from the automation data context.
• The code ensures that all recipients are valid and deduplicated before sending.
• Logs success or failure and gracefully handles errors.

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❗ Known Limitations

• HTML formatting in Body must be valid; invalid HTML may cause send errors.
• No attachments support currently.
• Only Microsoft 365 (Graph API) is supported as the sending provider.

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