mailer.sh

# mails_raw.txt ==> Ken Thomson 555 1234567 ken0[at]thomson.com  ... etc.
input="mails_raw.txt"
regex="(\w{1,})\[at\](\w{1,}\.\w{1,})"
while IFS= read -r line
do
  while [[ $line =~ $regex ]]; do
	echo "${BASH_REMATCH[1]}@${BASH_REMATCH[2]}" >> mail.txt
        line=${line#*"${BASH_REMATCH[1]}"}
  done
done < "$input"

input="mail.txt"
while IFS= read -r line
do
  echo $line
  echo “İyi sınavlar!” | mail -s “Sınav” $line
done < "$input"