too long to send email notification

The speed at which emails are sent always depends on the speed on your mail server, a 'localhost' one like CDONTS uses will always be faster as you don't have that network delay in contacting the mail server.

A 1000 emails does seem like allot of emails to be sending.

The only thing I can suggest is that all the email notifications are kept in the table tblEmailNotify in the database and that maybe it might be worth deleting all entries in this table and if people do want to re-subscribe to email notifications they can do.

However, most of the time people only subscribe to a particular topic which is why it seems strange that a 1000 emails are sent each time a post is made, unless for some strange reason all your members are requesting email notification to all posts in that forum.

Having 1000 emails sent each time someone posts must also be a big strain on the server, so I would recommend trying to cut this amount.

The problem with ASP is that each page needs to be called by a web browser inorder for the ASP page to run.

This means that it is not possiable with pure ASP to save the post, return the user to the page displaying the topic, then send the emails. As the page to send the emails needs to be called by the users web browser.