Power Platform Community Forum Thread Details

Hi all,

can you help me? I'm setting up a flow where all emails coming from external senders, should be moved to a specific inbox folder. this is the error:

The input parameter(s) of operation 'Condition' contains invalid expression(s). Fix invalid expression(s) for the input parameter(s) of operation 'Condition'.

How to fix: 1.Click on the "Condition" action in your flow. 2.Review the condition statement. Make sure it checks if the email sender does not contain "@DOMAIN.COM". 3.Use the dynamic content picker to select the sender field and type "@DOMAIN.COM" in the comparison. 4.Save your changes and test the flow again.

I've checked the condition and it is correctly set-up.

thanks for your help! Elena

Categories:

Building flows

Hi @EG-28040853-0 (Elina),

Why this error happens (even when the condition “looks” correct)
The Condition action breaks when:

You compare complex objects (like From or Sender) instead of a string
Or you mixed dynamic content + manual text in a way Power Automate can’t parse

Most commonly, people use “From” instead of the sender email address, which causes:
invalid expression(s)

Correct way to check for external senders (recommended)
Step 1: Use the Sender email address field
Do NOT use:

From
Sender
Address (object)

Use From (Address) or Sender email address (string)

Step 2: Use Advanced mode in the Condition
Click Condition → Edit in advanced mode
Paste exactly this expression:
@not(contains(triggerOutputs()?['body/from/emailAddress/address'], '@domain.com'))
Replace @domain.com with your internal domain
This avoids invalid object comparisons

Alternative (Safe UI Method – no advanced mode)
If you prefer the basic UI:
Condition setup

Left value: From (Address)
Operator: does not contain
Right value: @domain.com

If this still errors, switch to advanced mode (above). The UI is buggy for email objects.

Move email action (after condition)
In the Yes / True branch:

Use Move email (V2)
Folder: your target external-email folder

How to fix an invalid expression in Power Automate

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Sunil Kumar Pashikanti, Moderator
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