Levels of spam is not dependent on ISP - it's all about how many sites/companies who get a kick out of on-selling your email addy that you register with, or how many forums/blogs etc that you leave your email addy on for the world to see (and harvest).
I'm with optus and this works fine for me .. so if you want to stay with optus here's my 2 cents:
- create a new alias email address via
https://memberservices.optuszoo.com.au/user_management/add/
- create a new gmail account, and in Settings -> Forwarding, specify your newly created optus email address, also set it to keep a copy of messages (see below)
- optionally, setup a secondary gmail account, for all online subscriptions, newsletters, forums etc and configure it to forward to optus as per the last step.
- gmail has excellent spam filtering that continually 'learns' from the actions of it's users
- access your email either via optus webmail, the gmail website, your 3g phone (browse to m.google.com/mail then download the app - this is brilliant btw), or good old outlook tied to your optus account.
- hand out your optus addy only to close friends, and only if you don't want to use gmail to read your mail .. hand out the gmail address/es as appropriate .. try not to leave it on any website that google can index of course.
- if you ever need to for whatever reason, you can easily change your secondary (gmail) address while keeping the primary optus one constant - theoretically it should never receive spam as it should never be published anywhere.
- if you want to check how 'spammable' your current email addy is then just google "
[email protected]" and find out
all this sounds convoluted but is fairly quick and easy and only takes a few minutes, with the exception of re-subscribing to newsletters/forums etc, which it sounds like you're planning on doing anyway.
hope this helps