re: When I try to change my reply to address it shows "recipients will reply to this other address" and I can't change it.

So the 'Reply-to Address' is empty. What do you mean by 'I can't change it' ? You do not say what you did.

Tools > Account Settings for the mail account or right click on mail account name in Folder Pane and select 'Settings'

Reply-to-Address: 'recipients will reply to this other address' will be in a greyed font. You put the mouse cursor in this text box and over write with the email address you want to use. click on 'OK' to save changes.

You can also get access to the various options and text boxes by using the 'Tab' key on your keyboard. Right click on mail account name in Folder Pane and select 'Settings' Then press the 'Tab' key to move the focus to different sections, it should start with the focus on the mail account name and after pressing 'Tab' it will move to 'account actions', press again to move to 'Account Name', then 'Your Name:' then 'Email Address' then 'Reply-to-Address' so that you can type the email address.

My misunderstanding. I get it now. Thanks!