Group Contact was working before, now it will not work

[LSM]

I have a number of group contacts where I email my message to. It has been
working well for months. However a week ago, Outlook returned the mails
saying the contact addresses are not vaild.

I cannot find any solution any where. Can anyone help?

 

[Russ Valentine]

We have no idea what you mean by group contacts. If you mean a Distribution
List, this is a common occurrence. DL's are not reliable or robust. They
become corrupt frequently and cannot be repaired. Few of us rely upon them
for that reason.
You can always try restoring it from your most recent backup.