Hi,
the html for the email fields is messed up. This does not just happen, without any changes to the website but it must not necessarily be a change in Visforms. Visforms is used by thousands of people and almost any one of them uses an email fields without problems, so I think this is an individual problem of your Joomla! website and configuration.
Visforms 3.5.8 is actually quite an outdated Version (as well as Joomla! 3.4)
(Latest stable Visforms Version is 3.7.7).
Problems like this can be cause be old overrides in your template (after a Visforms Update), by some javascript that is added by another extension than Visforms (for example the template or a module) but interacts with the html-tags or classes of Visforms. There are many other reasons as well.
The easiest way to find out, what causes the broken html would be, if I could debug a copy of the actual installation on a local test system, but this is individual debugging, which I cannot do for free. I offer a
support ticket
for such occasions.
Regards,
Aicha