Hi stuu3270,
Thanks for chatting with me over PM, glad to hear you're now able to access your mailbox.
In answer to your question about what caused the account to be locked out: this happens as a security measure when the account is flagged for spam activity - but can also be triggered by legitimate activity from time to time.
If you have any concerns, we would advise to reset the mailbox password to ensure that the account is secure. To go the extra step, you can also reset your security questions and answers on the account.
Let us know if you need help with anything else!
Beth
Beth