Unable to send message;Reason:554 5.2.3 Mail Policy violation : Mail Size exceeds limit

Hi All Good Day,

I am trying to send an email with an attachment but getting an error as below.

Unable to send message;Reason:554 5.2.3 Mail Policy violation : Mail Size exceeds limit

Please can you help me to sort out the issue.

my email address is: vmandepudi@teqleader.com

Many Thanks,