How do I block all emails sent from one domain?

To reduce spam, or block unwanted emails from one source, you might consider blocking all email from a single domain – for example every email coming from @telstra.com.au.

To block a domain: 

Go to Sign in to webmail
Forgotten something? Retrieve your email address or Reset your password.
Log in using your Telstra email address and password
Select Settings on the top right of the screen 
Select Mail on the left hand menu 
Select Blocked Senders on the sub menu
In the pop-up screen enter the domain with the symbols *@ in front of it. eg: *@telstra.com.au
Select Add.

Good to know: To block a domain you must enter the whole domain exactly as it appears.  Similar domains won’t be blocked. Eg:  @telstra.com.au won’t block @telstra.com. You’d need to block @telstra.com as well. If you receive unsolicited marketing, do not unsubscribe as this may validate your email address to spammers, who will then send more. Block the domain instead. 