Email generator auto save result

#!/bin/bash

# c0ded by : shutdown57
# Bagas Gtg


m="\033[1;31m"
k="\033[1;33m"
h="\033[1;32m"
b="\033[1;34m"
n="\033[0m"

s57_alert(){
    echo -e $k"[-]"$n $1
}
s57_danger(){
    echo -e $m"[X]"$n $1
}
s57_info(){
    echo -e $b"[!]"$n $1
}
s57_good(){
    echo -e $h"[+]"$n $1
}
s57_save_result()
{
    echo $1 \n >> __s57_list_email_result.txt
}
s57_generate_email()
{
    s57_info "Generating Email Please Wait ..."
    sleep 1
    user=`cat $1`
    domen=`cat $2`
    userx=$(echo $user | tr "\n" "\n")
    domenx=$(echo $domen | tr "\n" "\n")

for ucer in $userx
do
    s57_info "    ---- Generating for user : "$ucer
    for domeng in $domenx
    do
        s57_good $ucer"@"$domeng
        result=$ucer"@"$domeng
        s57_save_result $result
    done
done
        if [[ -f "__s57_list_email_result.txt" ]]; then
            s57_info "result : Saved to __s57_list_email_result.txt "
        else
            s57_danger "result : Not Saved :( , Not Writable directory"
        fi
}
clear
echo -n "masukan bool domain : "
read bd
echo -n "masukan bool user : "
read us

    s57_info "Checking File Exist ..."
    sleep 1
    if [[ -f $bd && -f  $us ]]; then
        s57_good ".......... "$bd" OK !"
        s57_good ".......... "$us" OK !"
        s57_info "Checking Valid File format ..."
        sleep 1.5
        if [[ $us =~ ".txt" && $bd =~ ".txt" ]]; then
            s57_good "Format valid !"
            s57_generate_email $bd $us
        else
            s57_alert "File format for "$bd" and "$us" Not valid"
            s57_alert " File format must file.txt"
        fi
    else
        s57_danger "......... "$bd" KO !"
        s57_danger "......... "$us" KO !"
    fi