The Scenario
You are a developer at a SaaS company. It is Tuesday afternoon and the product team has just triggered a password-reset event for 400 users whose accounts were flagged during a security audit.
The user data is in an Excel workbook: email in column A, first name in column B, reset token in column C. You have a Postmark template already built and tested, template ID tmpl_reset01. Legal wants confirmation that every email went out before close of business.
The slow version:
- Write a script, install the Postmark SDK, handle rate limits, log errors
- Run it, debug the three rows that failed, re-run those
- Check the Postmark dashboard message log to confirm delivery
- Export the message IDs and paste them into the workbook
- You are still at your desk at 7 PM.
The fast version is one prompt.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent inside your Excel workbook that reads the data and calls the Postmark batch send API for you, so you do not have to touch the SDK or write error handling.
Open the SheetXAI sidebar and type:
Send a batch of Postmark templated emails to all rows in the 'Users' tab of this workbook — recipient email in column A, first name in column B, reset token in column C — using Postmark template ID tmpl_reset01. Write the returned message ID or 'Error: [reason]' into column D for each row.
SheetXAI reads the tab, calls Postmark's batch send endpoint with the template and per-row variables, and writes the message ID back into column D. If any row fails, the error reason lands in column D for that row.
What You Get
A completed send with a per-row audit trail in column D:
- Message IDs for successful sends — one per row, from Postmark's response
- Error reasons for failed rows — specific enough to fix and resend
- 400 rows processed in one operation — not 400 separate script runs
The audit trail is in the workbook, not hidden in a dashboard. Legal can open the file without needing a Postmark login. If you need to pull delivery confirmations later, ask SheetXAI to check the message IDs against Postmark's message detail endpoint and write the delivery status into column E.
What If the Data Is Not Quite Ready
Real user lists are messier than four-column exports.
When some email addresses are malformed
A few rows have addresses with extra spaces, missing domains, or obvious typos from the original import.
Check every email in column A of the 'Users' tab for formatting issues — trim whitespace, flag anything without a valid domain structure as 'INVALID' in column E, then send a Postmark batch using template ID tmpl_reset01 to all rows where column E is blank.
When first names have inconsistent capitalization
The first name column has all-caps, all-lowercase, and properly capitalized values mixed in.
Normalize the first name values in column B to title case. Then send the Postmark batch using template ID tmpl_reset01 with the normalized first names as the template variable. Write message IDs into column D.
When the workbook has duplicate email rows
The export ran twice and some users appear in two rows.
Deduplicate the 'Users' tab by email address in column A, keeping the first occurrence. Then send the Postmark batch using template ID tmpl_reset01 and write message IDs into column D.
When you need cleanup, dedup, normalization, and the send all at once
The workbook came from three different export jobs stitched together.
In the 'Users' tab: trim whitespace from column A emails, title-case column B names, flag any email missing a domain as 'INVALID' in column E, deduplicate by column A keeping the first row, then send a Postmark batch to all valid rows using template ID tmpl_reset01 — write the message ID or error into column D.
The pattern: instead of cleaning the list separately and then sending, you do both in one prompt.
Try It
Get the 7-day free trial of SheetXAI and open any recipient list workbook, then ask it to send a Postmark batch using your template. The Postmark integration is included in every SheetXAI plan. For related workflows, see how to pull a Postmark bounce report for list cleaning in Excel or the Postmark in Excel overview.