One or more mailboxes associated to the email server profile {0} have been disabled for sending email. Make sure that a valid ...

One or more mailboxes associated to the email server profile {0} have been disabled for sending email. Make sure that a valid certificate is installed for Microsoft Dynamics CRM to connect to the email server. Also check that the credentials specified to connect to the mailboxes are correct and have permission to send email. Then, enable the mailboxes for email processing.