I have my own email server and I've recently noticed that many of the emails I sent ended up in the recipients' spam folder. I have verified the IP of my mail server and it's not in any blacklist. What could be causing this? Could it be that my IP doesn't have a long history? How can I fix this?
closed as off topic by Wuffers, Simon Sheehan, Nifle, techie007, Tom Wijsman Mar 5 '12 at 1:22
Questions on Super User are expected to relate to computer software or computer hardware within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.
I recommend the MXToolBox SuperTool:
Other things you can try to pass common spam filters (like Google's):