About Postmark
Postmark is a cloud-based email delivery service designed specifically for transactional and notification emails sent by applications, SaaS products, and websites. Instead of marketing newsletters, Postmark focuses on critical messages such as password resets, order confirmations, receipts, and system alerts, ensuring they arrive quickly and reliably. The service offers developer-friendly APIs, SMTP sending, message streams, webhooks, detailed delivery and open tracking, and tools for managing templates and email authentication (SPF, DKIM, DMARC). Postmark is operated from Chicago, IL and is widely used by software companies, e‑commerce sites, and online platforms that need dependable, high‑deliverability email infrastructure.
A Postmark charge on your bank or card statement typically appears when your company or organization is paying for email sending through Postmark. This might be a monthly subscription based on a plan that includes a certain number of emails, or on-demand email credits that you or a colleague purchased. You may also see charges after a free trial transitions into a paid plan, when your usage exceeds your included email volume for the month, or when an existing subscription renews automatically. In some cases, you might briefly see a small authorization or verification transaction when you first add or update a payment method.
If you’re unsure about a Postmark charge, start by logging into your Postmark account at postmarkapp.com and checking the Billing or Account section for invoices and payment history. Look for emails from Postmark in your work or company email address, as receipts and billing notices are typically sent there. If you still have questions, you can contact their support team through the Help/Support section of the dashboard or via support@postmarkapp.com, providing the last 4 digits of the card, the charge amount, and date (but never your full card number). Common issues—such as multiple accounts in the same company, old test accounts still billing, or usage exceeding your plan—can usually be resolved by adjusting your plan, canceling unused servers/accounts, or requesting a review or refund where appropriate.