If you can't copy it, you can do this IF you're using Internet Explorer:
Get the post on screen.
Press F11 to maximize the screen and get rid of the menus, etc., so you can see as much of it as possible -- hopefully the whole thing.
Press the PRINT SCREEN button (top right of most keyboards).
Switch to your e-mail program. Open a new e-mail message, and make sure it's in HTML, not plain text (it's on the Format menu).
Put the cursor in the body of the e-mail message and press CTRL and V at the same time.
This will paste a copy of the screen with your message into the e-mail. You can't edit it, but it can be read. If it's too long for one screen, you may have to go back and copy the next portion of it and past that into the e-mail.