My Cpanel mail getting 1000s of deliver failed mails even though am not sending to anyone
I have a Cpanel mail which is configured to windows mail. From past 10days am getting 1000s of deliver failed error mails to my inbox. I contacted the support team so many times but they are unable to help me on this. After this issue, every mail is sending to my clients going into their spam folder. please help me on this issue. am attaching few mail screenshots.