Solutions for sending emails please, Vodacom

Vodacom does not want me to send emails without authentication, but webmail is an incoming email service provider, so all I want is for Vodacom to give me authentication details. I have sent emails, called the call centre, written reviews and all they say is "contact your email service provider for the details". This leaves me between the devil and the deep blue sea. I can send emails via my Telkom ADSL thus hardly using the 1GB I usually purchase monthly from Vodacom, but now I cannot send emails on the fly. Unfortunately for Vodacom, I am moving house soon and my contract comes up for review soon. I have been a loyal VODACOM customer for over 20 years, but if thebrelationship stops working, I will have to think of an alternative. And this over emails? Seems ridiculous that a company which specialises in communication is struggling so much to enable me to send emails using smtp.vodacom.co.za