Sometimes you will be able to send emails but not receive them. This is due to a restriction placed by your internet service provider. Below is a list of South African outgoing mail servers. Most of them will already work with the default mail.yourdomain.co.za (or .com etc.).
If you are hosted with us and your provider does not appear in the above list, or if you experience any troubles configuring your emails, feel free to contact us directly and we will gladly assist.