Shell Programming and Scripting

I have a following problem:

Code:

#!/bin/bash
NUM=`cat accounts | wc -l`; 
for i in {1..$NUM}
do
    account=`awk "NR==$i" accounts`;
    echo -e "\nAccount: $account\n";
    sudo ./backup_maildir $account;
done

"accounts" is a file with regular e-mail addresses, one in each line.
backup_maildir is expect script.

When the main script is executed, the 6th line successfuly echo current mail address, but the following line is not passing that string to backup_maildir script. If the $account variable is user@domain.com, a string that is passed to backup_maildir is {user@domain.com?} ?! How is that possible? How to solve it?

will this work?

Code:

#!/bin/bash
while read mail_id
do
  sudo ./backup_maildir $mail_id
done < accounts

btw try removing ";"

Thanks for help! Anyway, the problem was in "accounts" file, it was in DOS format, with \r on ends of lines. dos2unix command solved it.