How to set up a filter in the feedback form?

Question

PHP

Site on Bitrix. The solution we use for forms

spoiler

https://marketplace.1c-bitrix.ru/solutions/altasib...

There is a form, in the form there are such fields as:
Full name (text)
Email. address (text)
Mobile (text)
To (select)
etc. (text fields)
Our task is to send the message depending on the selection in the TO field, that is, to a specific mail