I have three email accounts set up on the Incredible. Only One account has the toggle to NOT remove messages from email server. The other two do not have that option.
I figured it out. It took me hours to set up incoming and outgoing from Charter. One thing I tried on the first account was to set up incoming as POP then outgoing as IMAP. The other two I set up incoming as IMAP.
I set those to up as POP incoming and the option to NOT delete from server is there. PHEW.
This is the first time in ages I can send outgoing mail from my phone using Charter.