Vodacom offers free 3GB email (vodamail) accounts to subscribers.
Your Vodacom email address is firstname.lastname@example.org (though you can setup additional aliases as well). You can setup / access your Vodacom email account by logging in to the Vodacom website or https://www.vodamail.co.za directly.
To access / setup your Vodacom4me email from your mobile phone, dial *111# and select option 7 (Email), now follow the prompts and you will be sent a link that you can use to access your mail (bookmark it). You can also setup email notifications here if you want to...
Alternatively, if your phone has an email client you can set it up for Vodacom (Refer to your manual) SMTP: smtp.vodamail.co.za, POP3: pop3.vodamail.co.za and your email username and password.