All mail to you for the last two to three weeks is always copied to your oldmail mailbox, a shadow, read-only mailbox. This happens even if you forward your email elsewhere, or process it through mail filters. If you have accidentally deleted a needed message or are concerned that something has gone wrong with your mail forwarding, you can recover the lost messages from your oldmail.
Your oldmail can only be read from CSLab's core servers. It is not automatically accessible through IMAP or webmail, though this may be able to be set up for you by your POC - it involves adding symlinks in your local imap folders area (e.g. $HOME/mail) to /var/oldmail/your_login and updating $HOME/.subscriptions. Your most recent oldmail is in /var/oldmail/your_login, and can be read with a command like:
mutt -f /var/oldmail/your_loginThis contains email from the current week. Email from the previous week is in /var/oldmail/your_login.0 and email from the week before that is in /var/oldmail/your_login.1.
Both the mutt and mail programs are known to work with oldmail. Unfortunately, you cannot read oldmail files directly using alpine, because the partition with these files is mounted read-only, and alpine requires that all mailbox files be writeable. But you can copy it by hand to your alpine folder directory (usually a subdirectory called mail in your home directory) via
cp /var/oldmail/your_login $HOME/mail/myoldmailand then typing
alpine -f myoldmail