Hi fiends, (Log in to hide this advertisement) I configured the bulk email server by using postfix ,dovecot,squrrelmail and Linux centos 6.4 o/s. I configured the DKIM,SPF and rDNS also. The problem is my sender score and ip reputation is very low thats why I am unable to getting the results as expected. Could anybody give suggestions for increasing the ip reputation? any help appreciated.