Is there a way to request for a domain to be blocked from emailing me?
I have reported these as spam via webmail multiple times but the email addresses just change but the domain is always similar.
It is getting annoying having these come through to my phone. I have them automatically ignored on my email client on my pc but can I request it be blocked permanently?
I think you can block a specic address but as you say this is easily bypassed. Better email services offer better spam detection, content filtering, etc. You should consider moving to a non RSP based email (e.g. GMail). That way you are not tied to Optus forever to keep your email address. You also get a lot of improvements in functionality (like 2FA and much better spam blocking)