The Scenario
Your company is switching sending infrastructure. You are the IT admin. The new domain is verified. The certificates are in place. What is left is replacing the SMTP2GO allowed senders list with the 25 addresses on the new domain.
You have the new addresses in an Excel workbook, column A. You need them in SMTP2GO. The old list needs to go.
The bad version:
- Log into SMTP2GO and navigate to the Allowed Senders section.
- Delete each existing sender one at a time, confirming each deletion.
- Add the 25 new addresses one at a time, typing or pasting each one individually.
- Spot a typo on address 17, fix it, and then wonder whether the deletion step left any old senders you missed.
Twenty-five addresses entered by hand with a confirmation click per deletion and another per addition is the kind of task that produces errors by design, not by accident.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent that lives inside your Excel workbook. It reads column A and can replace your SMTP2GO allowed senders list with exactly what is there — no dashboard clicking required.
Update my SMTP2GO allowed senders to exactly the 25 addresses in column A of this Excel file — overwrite the current list.
What You Get
- The existing allowed senders list is replaced with the addresses in column A
- Column B gets "added" for each address that was processed successfully
- Any address that fails validation gets an error note in column B instead of a blank
You have a complete record of what was written to SMTP2GO and what, if anything, did not go through.
What If the Data Is Not Quite Ready
Column A has mixed-case entries that need to be normalized before submission
Replace the SMTP2GO allowed senders list with the addresses in column A after normalizing all entries to lowercase. Write "added" in column B for each success.
You want to preview the diff — what will be added, what will be removed — before making the change
Compare column A to the current SMTP2GO allowed senders list. Write "to add" in column B for addresses in column A that are not currently allowed, and "to remove" in column C for current allowed senders not in column A. Do not make any changes yet.
Some entries in column A are not valid email addresses and should be skipped
Replace the SMTP2GO allowed senders list with addresses from column A, skipping any row that does not contain a valid email address format. Write "added" in column B for successes and "skipped: invalid format" for rows that were excluded.
Full kill chain: validate, deduplicate, replace, and report in one prompt
Take all addresses in column A. Normalize to lowercase, trim whitespace, and remove duplicates. Validate that each remaining entry is a properly formatted email address. Replace the SMTP2GO allowed senders list with the validated unique list. Write "added" in column B for successes, the error reason for failures, and a summary at the bottom: total attempted, total added, total failed.
The safest way to replace a production sender list is to put all the validation logic into the same prompt rather than trusting that the source data is clean.
Try It
Get the 7-day free trial of SheetXAI and open the Excel workbook holding your new sender addresses, then ask it to update your SMTP2GO allowed senders list in one pass. For the access audit side of the same migration, see the spoke on listing your SMTP2GO SMTP users into a workbook.