I want a different "From" email address!

Question

Hi all.
I have an email address with my ISP and that is the address that I want people to use (call it "[email protected]").
But I use three machines (iMac, iPod and iPad) on which I want my emails to be synchronised.
Therefore, on all three machines, I have configured Mail to have a single account, my MobileMe account in which I have the email address "[email protected]". As a result, my emails are constantly synchronised. If I read an email on one machine, it appears as having been read on all three. If I delete it, it's deleted on all three machines.
In Mail configuration _on the iMac_, on the "Account Information" pane, there is a field called "Email Address"; in that field, I've entered "[email protected]", even though this account is really the MobileMe account. As a result, when people receive an email that I've sent from the iMac, the address they see in the "From" field is "[email protected]".
(I should mention that on the iMac I've configured Mail to use my isp's Outgoing Mail Server, i.e. something like "smtp.videotron.ca", not the "smtp.me.com" server.)
However, when I send an email from the iPod or the iPad, the address people see in the "From" field is "[email protected]". If they reply to the email, that is also the address that is used. I don't want that and I would like the "From" address to be "[email protected]", just like on the iMac. (On the iPod and the iPad, the smtp server is "smtp.me.com").
My question: *Is there any way to do this in Mail on the iPad and the iPod?*
Thanks!

Answer 1

It woiks! It woiks!
Hi all.
Finally figured (with your help, comments, etc.) a way to achieve what I was looking for.
All the emails I receive (at three separate addresses which are forwarded automatically to my address at me.com) end up in my mailbox at me.com; this mailbox is kept synchronised, via MobileMe, on my iMac, iPad and iPod. Whatever machine I'm on, if I open an email I've received, it appears (almost instantly) as read on the other two machines. Whatever machine I'm on, if I delete an email I've received, it's deleted on the other two machines. Again, almost instantly.
Here's how I did it in the iPad preferences for Mail, Contacts, etc... (for the iMac Mail config, refer to my original question):
(first, I took snapshots of all panes of the iPad Mail configs and emailed them to myself on the iMac so that I could go back, if I screwed up badly. Also, note that in between some of the steps, I turned the iPad OFF, then ON. I believe some changes only take effect on power down or up.)
1- I deleted all the accounts.
2- I created a new account of type "Other" and named it "Main account", with address "[email protected]", type IMAP, with Incoming Mail server "mail.me.com" with my MobileMe user name and password, and outgoing mail server as "smtp.videotron.ca".
3- I got a msg that it couldn't connect using SSL and accepted the offer to try setting up the account without SSL (which it did).
4- I turned ON Mail and Notes which were the only two options offered (not Contacts nor Calendar nor Bookmarks.
I then tested that I was able to send emails from the iPad and that on all three machines, the sender was listed as "[email protected]". I also tested the email synchronisation.
5- In iPad preferences for Mail, Contacts, etc. I created a new account, of type "MobileMe", using my MobileMe Id ([email protected]), but only activated Contacts, Calendar and Bookmarks, NOT Mail nor Notes.
That's it.
I'll replicate this configuration on the iPod and expect no problems there.
Thanks to all who participated; I hope this thread can be of some use to others.