[cvsnt] How mail is sent on a watched file ?

[Raghuraman]

Hi All,

Can you please help me in understanding how watches work. I have properly
set notify,users,checkoutlist files in CVSROOT.

I add watches on a particular read-only file (abc.txt) using,

    cvs watch add abc.txt

I checked the same using,

   cvs watchers abc.txt

Output is, 

   abc.txt	cvs_admin	edit	unedit	commit
	        admin	tedit	tunedit	tcommit

When i do an edit, it gives me the following error message...

cvs edit abc.txt 
'mail' is not recognized as an internal or external command,
operable program or batch file.

The file is writable. but no mail is sent.

Can anyone help me in this...

Thanks in advance,

Raghuraman.