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Saturday September 22 2018
Information Technology Services

Troubleshooting Mail Delivery

There are several reasons why mail sent to addresses might not reach the final destinations:
  • Bad behavior by the sending host. This blocking is done at U-M's primary mail gateway for all mail going through that gateway. For details see E-Mail Blocking at U-M.
  • Optional spam blocking. Users may choose to have mail from known spam sources blocked. For more details, see Using the Do Not Spam List to Reduce Spam.

Troubleshooting Tools

  • Block Status Check

    Use the Block Status Check tool to find out if a particular IP address, e-mail address, or domain is currently blocked.