Problem with username self registration

The user self registration link does not appear to be working. Each time the user enters an email (even after making sure that the email is not already registered) a message “Problem sending confirmation email” appears on the top left of the screen. This makes it impossible for new users to self register.
Regards, Tim

Hi Tim –

We’ve found and fixed a problem with outbound emails from our site. (Would have affected users Sep-26 and Sep-27). Sorry about the inconvenience. Please let your users know they should try again.

Regards, WILL