hi,

i have a mail content file like
--- mail.txt ----
hello,

please do the following action in $days days. Visit $site_add ......

thx
-----

now i want to send a mail to 100 user from a script
script
-------
days=7
site_add=http://www.dummysite.com

mailx -s "test" abc@xyz.com < mail.txt

--------

Desired output in mail
-----------------------
hello,

please do the following action in 7 days. Visit http://www.dummysite.com......

thx
----------------

can you please help me here,

thanx alot in advance.
--Pooja

You'll have to substitute it yourself
sed 's!$days!'$days'!g;s!$site_add!'$site_add'!g' mail.txt | mailx -s "test" abc@xyz.com