I am using Gmail about 12 years.Gmail.com is giving free space of 15GB for store emails. if you want more space upto 100 GB then it’s monthly plan of$1.99/month. you can store about 300000 Lakh mail to your account. you can send attachment upto 25MB but the best thing is that now you can send attachment up to 10 GB by intigrating Gmail with it’s cloud service GOOGLE DRIVE. all features are impressive to me.