Can you please help me in solving the issue.
I have a single exchnage server 2013.
I am using DuoCircle Outbound SMTP to send my emails (also uses 1and1 in case any issue).
From yesterday evening all the emails are going to Queue and the Smart Host Connector Delivery is showing Active.
I am also using FortiDDNS for IP.
I ahve rebooted DC and Exchange server. Removed Kaspersky Security also.
Please help me sort out the issue.