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Postmark

by ActiveCampaign, LLC (Postmark)

Send transactional emails with industry-leading deliverability, manage templates, and track bounces with Postmark

CommunicationPaidAPI keyemailtransactionalsmtpdeliverabilitytemplatesnotifications

How agents use Postmark

  • Agent sends transactional emails (confirmations, resets, invoices) using pre-built templates with dynamic data
  • Agent monitors bounce lists and removes invalid addresses from customer databases to maintain list hygiene
  • Agent sends batch notification emails to a user segment when a system event or announcement occurs
  • Agent checks message open and click tracking to determine follow-up actions in a drip sequence
  • Agent delivers alerts and reports via email after completing data processing or monitoring tasks

Agent actions

Send EmailSend a transactional email to a recipient

Inputs: to, subject, htmlBody, textBody, from, cc, bcc, replyTo, tag, trackOpens, trackLinks, metadata

Returns: messageId, submittedAt, errorCode, message

Send Template EmailSend an email using a pre-defined Postmark template with variable substitution

Inputs: to, templateId, templateModel, from

Returns: messageId, errorCode

Send Batch EmailsSend up to 500 emails in a single API call

Inputs: messages

Returns: results, successCount, errorCount

Get Bounce DetailsRetrieve details of a specific email bounce

Inputs: bounceId

Returns: bounce, bounceType, email

List BouncesList email bounces with optional type and date filters

Inputs: type, count, offset

Returns: bounces, total

Get Message DetailsGet delivery and open tracking details for a sent message

Inputs: messageId

Returns: message, status, opens, clicks

List TemplatesList all email templates in the server

Inputs: count

Returns: templates, total

Example workflows

1

Password reset flow

Send password reset emails using a template with a secure one-time link

2

Invoice delivery

Send invoices to customers via templated emails with dynamic billing information

About Postmark

Vendor
ActiveCampaign, LLC (Postmark)
Pricing Always review details with the vendor
PaidUsage-based: starts at $15/mo for 10,000 emails. No free tier, but 100 test emails during trial.
Authentication
API key
Rate limit Always review details with the vendor
300 requests / minute
Compatible nodes
AgentResourceOutput

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