Error while sending a mail from mutt

[AYAN KUMAR HALDER]

Hi,

I am trying to send a mail using mutt. I am getting the error as follows :-

SMTP session failed: 501 5.5.4

I understand the error meant that a valid mail transaction protocol
was used with invalid arguments. Please let me know how do I debug
this issue further.

Regards,
Ayan Kumar Halder