Not sure. I installed Neomail on my Qube2 and it leaves the mail on the server. I have to use my default email program to actually clear my mail off of the server. What version do you have?
Version 1.25.It seems to delete it an then move it to the neomail mailbox instead. therefore regular mail clients cannot see it once Neomail has read it.
Jason -- http://www.cobalt-training.com Tel:+44 207 610 1010 Fax:+44 207 610 1551