Email with localhost instead of the correct website address

Dears

I am receiving emails with incomplete information,
localhost instead of the correct website address

Email body:
There is a security update available for your version of Drupal. To ensure
the security of your server, you should update immediately!

See the available updates page for more information:
http://localhost:8080/admin/reports/updates

Your site is currently configured to send these emails only when security
updates are available. To get notified for any available updates,
http://localhost:8080/admin/reports/updates/settings.

best regards
Guillermo

Hi Guillermo

You should be able to see which website(s) this related to by checking which e-group(s) the e-mails are being sent to. In any case, receiving an e-mail like this is obviously completely useless for you and they should not be sent out the way they are. I will be flagging this accordingly.

Thanks!