This can be due to any of the following reasons:

• Your account reached the inactivity period. Free accounts are suspended after 7 months of inactivity and totally deleted 5 months later. Paid accounts are not deleted as long as payments are received.
• Your account has been compromised and sent large amounts of spam emails, forcing our anti-spam/anti-abuse system to block it.
• We didn’t receive the outstanding subscription payment.
• There is a technical glitch.

Whatever the case it might be, you can contact our support by email using the reset/notification email address (the one you used while registering your account at Mailfence) of the Mailfence account in question.

The procedure for unlocking Mailfence account may include additional user identity verification checks.

When you contact us, please don’t forget to mention your account username/email address and subscription package.