I have long settings in iPad and I would like to get them automatically to devices such as iPhone and poussible to Mac in the future. How can I get the settings over all devices?
My first thought was that maybe you could use iTunes to sync your Mail settings back to your Mac. Then I found this: http://support.apple.com/kb/HT1296
So considering this, I think your best option is to configure your complex Mail Settings on your Mac by hand first. Then, you could use iTunes to automatically sync those settings to all your iOS devices. Not a 100% solution for your problem, but I think it's the best you can do within the limitations you have.