Send a mail to IDs listed in a text file

Shell Programming and Scripting
1

I have a list of mail ids in text file and want a ksh script that reads this text file and sends a mail to all mail ids with same subject line and content.

I am using UX-HP machine and KSH.

Thanks for help in advance!

2

what is the format of the text file?
are the Ids on each line? csv?

3

txt file can be anything, I just have a list of mail IDs. not sure what format of file to put these mail IDs. but list may grow in future. so, option should be there to add mail IDs later to the file.

4

from the format i was trying to ask that you file contains the IDs like,

[email protected],[email protected],[email protected]

or

[email protected]
[email protected]
[email protected]

or 

[email protected]|[email protected]|[email protected]

or even simply,

[email protected] [email protected] [email protected]

try respectively,

 
echo 'this is content' | mailx -s 'subject' $(cat file | tr ',' ' ')
or
echo 'this is content' | mailx -s 'subject' $(cat file | tr '\n' ' ')
or
echo 'this is content' | mailx -s 'subject' $(cat file | tr '|' ' ')
or
echo 'this is content' | mailx -s 'subject' $(cat file)
5

I have a text file mail_list.txt where mail ids are list one below the other
Ex:

[email protected]
[email protected]
[email protected]

6 
#!/bin/ksh
sendm()
{
sendto="$1"
/usr/lib/sendmail -t -i <<EOF
Subject: some
From: some
To: $sendto

Maildata

EOF
}

##### main #####
cat somefile | while read addr
do
      sendm "$addr"
done

More sendmail examples.