Email Alert is not working in a list in one site

[ayan]

Suddenly lists has stopped sending out alerts for changes. If you sign up for alerts....it will send out that alert e-mail successfully. It just doesn't ever send out alerts after that.It is happening in one site, other sites lists are sending email fine.

1) I verified that it wasn't a permissions issue by logging in as a site owner and signing up for alerts. Got the 1st e-mail but never got anything else after making changes.
2) Checked immediate alert status showing 100% success.
3) Win Timer Job is also working fine.

?

Any ideas?

SharePoint 2007.

[alina]

Sound like this is for an on-premise version of SharePoint.