Optional field for phone number

Hey Alan,

this feature has been requested many times: Please add an optional field for a phone number to the contact form. A lot of clients have asked me for such an input field over the years, because it would massively improve their workflow, if visitors could be asked to provide their phone number right away.

Since the phone number is not relevant for all users of the plugin, such an input field should be optional. And if you are very ambitious, please add a second option to make the phone number mandatory (if enabled).

Something like:

[x] Show input field for phone number (yes/no)
[x] Phone number is mandatory (yes/no)

I’m sure that many users would appreciate such an addition.

Best regards,
Bernd