Error 5452 in Outlook Express / Limit the Recipients to Less Than 50

  • 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, 10.0
  • Application: Microsoft Outlook Express
  • Application Version(s): 4.x

If you receive error 5452 while sending a message in Outlook Express, try reducing the number of people you are sending the message to.

Error Message

Error 5452

Cause

Too many recipients.

Solution

Limit the To, CC, and BCC to 50 people total. If that is not the problem, messages with several BCC addresses need to have at least one address in the To: field.