Im sick of this error. Is there a way to put a 60 secs timeout to ipop3d ? actually it looks like its 15 mins
Have you ever thougt about switching to maildir? The performance is better and you get rid of the poplock and corrupted mailbox problems.
Install dovecot: Code: yum install dovecot and then enable Maildir under Management -> Server -> Settings -> Email in ISPConfig.
It doesn't matter for webmail if you use Maildir or mbox. But if you change the format, you must transform your clients' emails from the old format to the new one, otherwise the mails are lost. You can do this with tools like mb2md (mbox -> Maildir) or maildir2mbox (Maildir -> mbox).