How can I conditionally generate email addresses based on user input

Dear Jotform,

How do I create a "set mask" email? every time I "set mask" an email .. eg example@gmail.com .. which appears to be example_gmail.com

Thanks

You can't mask Special Characters, do you want to make your email field input like a Password field (***********) ?

Please check this guide  on how to set mask using CSS.

https://www.jotform.com/help/369-How-to-Mask-Input-Text-in-Textbox-Field

This can be done on an Email field too, here is the sample form I created.

https://form.jotform.com/80104694848968

Let us know if you need further assistance.

I mean do not want to enter email field like Password field (***********).

Name: __________ (this is a dropdown field)

Email: ____________

via setting conditions I want to set:

if the name is filled "example" then in the auto email is written "example@example.com"

if the name is filled "amir" then in the email automatically written "amir@example.com"

etc

What you're describing is called concatenation and was discussed in great detail on the article linked below. The idea is to concatenate the name + @example.com using conditions.

Complete guide: How-to-Manipulate-Text-String-with-Conditions-and-Calculation 

Give that a spin and let us know if you'd need further help.