Subscription field

Hi,

I must say that the plugin really works fine and I intend to use it.

But there is one issue; when it’s activated subscribers cannot insert a symbol @ in email subscription field, it’s also impossible to use function (copy)/paste. I’m using one of the plugins for subscriptions. It’s set in the sidebar and the footer as a widget. It’s a good plugin I would really like to use them both.

Is there anything to resolve this?
Many thanks

https://www.ads-software.com/plugins/wp-content-copy-protection/