Cookies

[2savvy]

You could have somekind of auto form filler.
Does it know your name or address or anything else that you usually fill in when sending an online form? or is it just your e-mail address?

but that is a guess

[MacRidgeway]

because the site that you are visiting already saved a cookie on your computer and is retrieving it.

you at one time or another filled in a form on their site and this inormation was saved on your computer as a cookie for future retrieval