Email filtering and security

Email filtering

Email sent to ANU addresses is checked for both malicious and undesirable content. Filtering software analyses the content of messages and scores it against a set of rules. Messages containing viruses or other malware are discarded. Mail with a high likelihood of being spam is quarantined rather than delivered.

Quarantine service

The quarantine service allows users to

  • Check mails which have been quarantined
  • Release mails which may have been incorrectly flagged
  • Mark addresses or domains as never blocked
  • Mark addresses or domains as always blocked
  • Disable spam filtering entirely for their account (not recommended)
  • Set up a daily digest notification of blocked messages
  • Arrange to temporarily hold messages for longer than the default of 14 days

Reporting spam

Mail can occasionally be misclassified, incorrectly allowed through or blocked.

If you receive mail that is spam and has been incorrectly allowed through, report it by attaching the email to a new email and forwarding to

If mail has been incorrectly blocked, release it from quarantine or log a job with the Service Desk so that we can ensure it does not happen again.

If you are unsure whether an email is legitimate, please don't hesitate to contact the Service Desk

Note: If emailing the Service Desk please include the suspicious email as an attachment and clearly label the email title as ' SUSPECTED SPAM'.

Executable files

Files containing executable content may be blocked from sending as email attachments.

In many cases it is more appropriate to share such files through a service such as OneDrive or CloudStor, or to share a link to a location on the web.