- The email had been deleted from your quarantine;
- The email had been released before;
- You have clicked the release link via off campus network, please refer to the FAQ https://faq.icto.um.edu.mo/why-cant-i-access-the-links-in-user-digest-via-internet/.
- The email may be moved to the [Junk Email] folder. You may try to find it there, as in some cases, emails can be moved to the [Junk Email] folder by some tools, e.g., ESET Home Edition.