There are a few things to check/setup. You need to add an SPF record, (There are quite a few creators on Google: http://www.spfwizard.net/)
You also need to make sure your IP is not blacklisted (Again, there are many resources on Google to check it.)
Start with those and we will see how far you get
*This is still not guaranteed to work though. There are a lot of factors involved.
You can also Google how to fix it for even more info related to your specific install.
You also need to make sure your IP is not blacklisted (Again, there are many resources on Google to check it.)
Start with those and we will see how far you get
*This is still not guaranteed to work though. There are a lot of factors involved.
You can also Google how to fix it for even more info related to your specific install.