I require an email address for my Airbnb accommodation in Paris to complete the visa form. Many of the visa applications are online forms (eg Schengen) which will not proceed to the next page unless obligatory fields are filled - in this case a valid email must be entered. So, the guest cannot complete the visa application unless they have an actual email address to add into that space.
Once you have a confirmed booking you can message the host and ask for their email address. After a booking is in place, the system should not block the email address.
Once you have a confirmed booking you can message the host and ask for their email address. After a booking is in place, the system should not block the email address.