I'd get Nokia Messaging on the phone, much better than the inbuilt client. You can set it to manual retrieval only and do it when you're handy to WiFi.
I mentioned in your other post that it might be time to add a little data - for example Vodafone's $10 for 100MB would be enough for push email via Nokia Messaging, A-GPS, and browsing here and there too...
I think before, it has been on mobile data - prepay. I checked my balance and I noticed it has gone down, I tried to find the link to billing and cycle (VF) but I couldn't find it. Maybe I was using VF mobile data before and the simcard was equipped with that - that it just worked.
Then I put my 2degrees simcard in my phone and it won't work, it keeps asking me the access point name and password - what is this? I did this while wifi was turned on and I had a webpage opened.
Maybe it is a business model phone and it connects directly to access the email client. If I install a 2nd email account I have the choice for it to be manual or to put it underneath my primary email and it will also be automatic.
I was on VF simcard and immediately it said ding dong - you have new mail, while it was just sitting there on the table.
Put my 2D simcard in and it said continously asking me for the access point name ... I still working on the setting in that, I got the 3x messages that contains the settings but doesn't work for the email client.
Also, Skype is not yet supported on the E75, anything in the pipeline or can I use MSN or something else?