Symfony2 - @Assert\Email() changes field height

Question

i'm using @Assert\Email to validate an email field, but it looks like it changes the fields appearence even if it' really doesn't... The css style is still there although somehow for an unknown reason (to me at least) the field looks smaller, in height. Is there anyway to avoid this?

Example:

Answer 1

I ended up using a custom Regex

 @Assert\Regex(pattern="/[a-zA-Z0-9\_\-]+[a-zA-Z0-9\.\_\-]*@([a-zA-Z0-9\_\-]+\.)+([a-zA-Z]{2,4}|travel|museum)$/")