We have Magento CE 1.9.0 running on CENTOS 6.5 x86_64, with Apache 2.4/PHP 5. I have an issue where my exchange server is not receiving any transactional email from my Magento box.
I do receive transactional emails to @hotmail.com, @yahoo.com and @gmail.com but not to my Exchange server corporate account.
SPF record looks good.
Any tips would help.