suddenly, all my incoming goes to delete folder, just like that
You've posted in the wrong place. The Microsoft webpage can be confusing; the
first alphabetical entry is for the database software Microsoft Access.
Please scroll down the list of subject areas and post your question in a
newsgroup for your particular email program. Post the version you're using and
probably some more details of what you've done while you're at it.
John W. Vinson [MVP]