Hi @Dony 

Error seems to indicate an invalid email address is being provided to Mailgun.

Check your Zap configuration to make sure the variables are mapped correctly between Zap steps.

You can check your Zap Runs for the DATA IN/OUT for each step: https://zapier.com/app/history/

Please post screenshots with how your Zap steps are configured for us to have more context.

this address whatever i chooise still show error

@Dony 

This needs to be a valid email address.

You currently have a file variable mapped, which is causing the error.

how to choise valid email address ??????????  

@Dony 

For the (Email) Address field, you can set a static value OR you can map a dynamic value from a previous step.

previous step. means what?  not Address filed?

@Dony 

A Zap has steps: trigger + action(s).

Previous step means a step before the current step.

May be worth reviewing the Zap Basics help articles: https://zapier.com/help/create/basics

i know  i not see any way can do it

did you really success use  WP All Export Pro → Mailgun mail list  do it ????????