Hi there, @skaul. Thanks for posting on YesCrowd!
If you're getting this error when trying to use your OptusNet webmail account on Outlook, I'd recommend checking our guide on Using an email application with OptusNet email
Generally, your settings should match these:
Host: smtp.optusnet.com.au
Username: Your email @OPTUSNET.com.au
Password: Your Optus net email password.
Server Port: 25 (no SSL) or 465 (with SSL)
Let us know how you go!
→ Please note that we’re unable to look into account details on Yes Crowd. If you’re still needing a hand, we recommend Messaging us via the My Optus app.
Our Messaging team is available 24/7 and are ready to assist customers as quickly as possible.
If for some reason you’re unable to use the My Optus app, please send a private message to the official Optus Facebook page or Twitter page for further assistance.
