Why am I seeing an “undisclosed email address” error?

The "undisclosed email address" error occurs when an email account’s storage quota is exceeded. See https://us.cloudlogin.co/help/view-article/?id=517 for details. To resolve, either:

• Increase the mailbox quota via the Mailbox Limits icon at https://uk.cloudlogin.co/mail/.
• Delete messages from the affected email account to reduce storage usage.