Problem with same domain email sending/webmail/outlook express

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http://forums.cpanel.net – Hello everyone, I'm having a major issue with a new WMH/Plesk instalation on a CentOS server regarding emails. The problem is as follows: I have a particular account under of the domains which can send emails just fine. However, when viewing arriving emails with webmail/squirrelmail you can see that there are new emails on the inbox folder. After this, trying to sync the mail with outlook express not only does NOT download the new emails from the inbox but DELETES them and they never arrive. Aditionally when sending emails to this account, some of them arrive sometimes and some o (HowTos)