Create Gmail Filters

  1. To make sure your mail server will not accidentally discard important messages from our class as spams, you should establish a message filter.
  2. Take Gmail for example, you may go from the Setting, and then choose Filter.

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  3. Click the link "Create a new filter".
  4. In the "From" field, type "ipv6.club.tw", and click "Create filter with this search".
  5. Check the item "Never send it to Spam" and click the button "Create filter".
  6. This will teach Gmail not to dispose messages sent from this server as spams in the future.
Reference:
  1. Using Filters