The Problem With Getting Workbook Data In and Out of Laposta
You have an Excel workbook full of data — event registrants with name, company, and city; a bounce list from your last send; a table of custom field definitions you spent an hour building. You need it in Laposta, or you need what's already in Laposta pulled back into a workbook, and neither direction is as clean as it should be.
Laposta is good at sending professional, segmented Dutch-market email campaigns. But the path between a workbook and a Laposta list runs through a lot of manual steps. The usual flow is: export a CSV from Excel, format it to Laposta's column expectations, import it through the UI, check which rows failed, fix them, re-import.
Below are the four common ways teams handle this. Only the last one scales.
Method 1: Manual Copy-Paste
The default. You have the data in a workbook and you need it in Laposta. So you export the worksheet as a CSV, go to the Laposta import screen, upload the file, step through the field-mapping wizard, and wait.
For a one-time list of 200 people this is tolerable. But Laposta's import screen doesn't forgive formatting surprises: a date in the wrong locale, a custom field that doesn't match what's already on the list, a company name with a comma in it that trips the CSV parser. You end up doing two or three passes before the full list is clean.
And that's just the import direction. Going the other way — pulling campaign stats or subscriber records back into a workbook — means downloading a report, opening it, deleting the Laposta-specific columns you don't need, reformatting dates, and pasting everything into position. Once a quarter feels manageable. Once a week starts to feel like the job is running you.
Method 2: Power Automate
Power Automate has Laposta connector options. You can wire up a trigger on an Excel table row, call the Laposta API, and push the new contact into a specific list.
Before you go further: do you know what a cloud flow trigger is? A dynamic content binding? A REST action with authentication tokens? If those feel like someone else's problem, skip ahead to Method 3 or 4. You'll save yourself a frustrating afternoon.
If you're still here: the setup is real work. You pick a trigger — new row added to an Excel table, or a recurrence schedule. You map every column to the right Laposta field, including any custom fields by their internal API name. You authenticate both services. You test on a sample row. It works.
The problem is what it doesn't do.
A row-by-row trigger fires once per subscriber. Uploading 1,200 attendees from last week's event means 1,200 separate flow runs. Depending on your Microsoft 365 license tier, that burns through your monthly run quota faster than you'd expect.
You probably just need all those names in the list before the newsletter goes out. You probably have no idea how your Power Automate run limits work. So you flag it for whoever on your team handles the business automation platform, and now it's their queue, not yours.
Once you need to pull data back — campaign stats, subscriber records with custom fields, segment memberships — you're writing multi-step flows with HTTP actions and JSON parsing that most non-developers won't finish.
Method 3: The Previous Generation — Connector Add-Ons
Until recently, the best option for repeatable workbook to Laposta workflows was a category of add-ons that let you configure column mappings and saved templates. You tagged your columns, matched them to list fields, saved a config, and ran it.
That was a real step up from re-importing CSVs every time. The template remembered your field mapping, output was consistent, and you didn't have to redo the formatting on every run.
But you were still responsible for the mapping itself. You had to know your Laposta list's custom field names. You had to decide which rows to include. You had to handle the logic of what to do with duplicates. The add-on got the data through, but the thinking was still entirely yours. And if a column moved or a field got renamed, the config broke until you went back in and patched it.
This is the previous generation. It worked, but it asked a lot of the operator.
The Easy Way: Using SheetXAI in Excel
There is a different way entirely. SheetXAI is an AI agent that lives inside your Excel workbook. It reads the workbook, understands what you are looking at, and through its built-in Laposta integration it can push subscribers, pull campaign stats, create custom fields, or remove contacts for you. No CSV export, no field-mapping wizard, no automation glue. You just ask.
Example 1: Import a full attendee list into a specific Laposta list
Add all rows from Sheet1 as new members of Laposta list Post-Event-2024 — use column A as email, column B as first name, column C as company (custom field), skip any row missing an email
Every valid row lands in the list. Rows missing an email are skipped cleanly, with a note written back to column E so you know which ones were skipped.
Example 2: Pull all 2024 campaign stats into a summary worksheet
Fetch all Laposta campaign reports and write a summary table to the Dashboard worksheet with columns: campaign name, sent date, recipients, open rate, click rate, bounce count, unsubscribe count — one row per campaign
Instead of downloading a Laposta report and reformatting it, you describe the output shape you want. SheetXAI handles the API calls and the column layout in one pass.
Try It
Get the 7-day free trial of SheetXAI and open any Excel workbook with subscriber data or a list of campaigns to analyze, then ask it to do one of the tasks above. The Laposta integration is included in every SheetXAI plan.
More Laposta + Excel guides
Bulk Import Subscribers Into Laposta From a Google Sheet
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Pull Campaign Performance Stats From Laposta Into a Google Sheet
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Export Active Subscribers From Laposta Into a Google Sheet
Pull all active members from a Laposta list — with custom fields — into a spreadsheet for CRM cross-referencing.
Scaffold a Custom Field Schema on Laposta From a Google Sheet
Create all custom subscriber fields on a Laposta list in one shot from a spreadsheet definition table.
Bulk Remove or Unsubscribe Contacts in Laposta From a Google Sheet
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Audit All Laposta Campaigns Into a Google Sheet
Pull a structured inventory of every Laposta campaign — sender info, subject, delivery status — into a spreadsheet.
Create Mailing Lists in Laposta in Bulk From a Google Sheet
Create multiple Laposta mailing lists from a spreadsheet of names, notification emails, and descriptions in one pass.
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Pull every segment definition across all Laposta lists into a master spreadsheet for audit and consolidation.
Audit Custom Fields Across All Laposta Lists Into a Google Sheet
Export every custom field name, type, and required flag from every Laposta list into a single spreadsheet.