Recently, we have had a few users who complained they were unable to sign up using "googlemail.com" accounts. I double-checked, googlemail.com is not listed under the banned email addresses. To be certain, I deleted all banned addresses, disabled all add-ons and even the listeners in config.php. Yet, the issue persists. When I try to change an account in the ACP, I still receive the message: Where else could I be looking? Any pointer is appreciated.