Problem:

The issue here is that the user wanted to customize their Toolset Forms notification headers.

Solution:

You can use the function below to modify the email notification headers.
https://toolset.com/documentation/programmer-reference/cred-api/#cred_mail_header

Problem:

The problem here is that the user's WYSIWYG field is not displaying external URLs correctly whenever the WYSIWYG field is added inside a conditional shortcode.

Solution:

This only occurs when you've formatted the conditional statement to use the shortcode of the custom field like below.

[wpv-conditional if="( '[types field='other-activities'][/types]' ne '' )"]Some Text[/wpv-conditional]

However the issue can be resolved by formatting the conditional like below

[wpv-conditional if="( $(other-activities) ne '' )"]Some Text[/wpv-conditional]

Notice the use of a different format to call the Types custom field