mail using mail address in a file

I have a file which contains few email address. I have few scripts which use the same mail address. so if any change in mail id like if any user do not want to receive the mail i can just edit a single file instead of many scripts. So i want the scripts to use that file. How can this be done.

show your file format with email address.

file is in .txt format.

contents of the file:

'[EMAIL="'abc@xyz.com,def@xyz.com,ghi@xyz.com"]abc@xyz.com,def@xyz.com,ghi@xyz.com'[/EMAIL]