There are error messages in the HubSpot forms which always appear if, for example, an e-mail address is incomplete or a required field has not been filled in. Currently I cannot change anything about this text. However, it would make sense if we could customize this content.
I'd also see great benefit in being able to edit/customize the error messages in form validation routines. In addition, setting focus to the first affected field would go a long way toward achieving accessibility requirments.
Agreed - we have free email providers blocked for a form. If you enter a gmail address, it shows this error message: "Please enter a different email address. This form does not accept addresses from gmail.com." - We want to edit this error message so we can link to another place that person can submit rather than being blocked. Would be great to edit this error message.