Computers and internet?

Question

i received two days ago an emai and on the " to " field it said undisclosed recepient@yahoo.

how this is done?

Answer 1

It will happen if all of the recipient is being put in the Bcc field instead of the To field. It could indicates that the letter was address to more person not just you. If the content is a kind of advertising then it could be a "spam" mail.

Answer 2

IT MEANS YOU A PART OF A GROUP OF EMAIL RECIPIENT.  IT'S GROUPED IN YOUR "CATEGORY" GP OF YOUR ADDRESS BOOK. ONE HAS TO ESTABLISH IT.

Answer 3

Set your email program, if you can, to treat any email with no To: address as spam - because they all are.