SpamUnwanted e-mail, so-called Spam, often of doubtful content, has long been a nuisance for most users of the PSI and other Mail systems.
AIT automatically checks and filters all mail for Spam and tags potential spam messages as such.
At https://spamfilter.psi.ch/ you can control what mails have been tagged as spam. Its all done automatically. If you want to, look at the weekly quarantine digest mail you will receive and if there is a mail listed that should be in your mailbox - simply release it from within this mail.