Question : App. Emails Delivered Into Spam Folder

We have an application on windows 2008, On the Server we have enabled the SMTP Service. We are sending emails through application(Java app.) to outside world. When we deliver the mails all the mails are going to spam folder.

How to troubleshoot the problem? How avoid this problem?

This should go into inbox. Provide us the solutoion?

Answer : App. Emails Delivered Into Spam Folder

There are a few SPF Query / Check tools out there.. here's one that seems to work: http://www.politemail.com/check-spf.aspx

If all of this checks out, you might be looking at Spam Scoring problem.  Some things you can do to try to mitigate this:  
 - Have you examined the content of the email for words that might trigger a filter?
 - Does the domain of the FROM address match the domain of the email server's reverse lookup?
 - Are your emails using the BCC field?
 - Are the TO & FROM address the same?

You might just need to tell your customers that they need to add your FROM address to their Contacts and/or Safe Senders list.