Error -23012: A Connection Failure Has Occurred / Verify Mail Settings

  • Operating System(s): MacOS
  • Operating System Version(s): 7.0.1, 7.1, 7.5, 7.5.1, 7.5.2, 7.5.3, 7.5.5, 7.6, 7.6.1, 8.0, 8.1, 8.1.1, 8.5, 8.5.1, 8.6, 9.0, 9.1, 9.2, 10.0, 10.1
  • Application: Microsoft Outlook Express
  • Application Version(s): 5.0

If you receive the error message: "Error 23012: A Connection Failure Has Occurred," it may be because the mail server is not responding. Resolve the error by verifying your email settings.

Error Message

Error -23012: A Connection Failure Has Occurred
Cause

The mail server is not responding in a manner that is consistent with accepted standards of Outlook Expres.
Solution

Verify your email settings. Refer to resolution How to modify Outlook Express mail setting for Macintosh..