After WP update the new users don't get an e-mail

Hi,

Normally i make a excel list and import it with batch create. The new users did get an e-mail with there account information in combination with HTML Email Template. But now, on 2 websites on different servers, the new users won't get an email anymore. It's necessary that they get the login information.

How to solve this? The users will be added and the admin do get's an email with a new registration but the new users not.

Regards