I am using to send email, but facing little issue my mails are going to spam instead of inbox, I don't know why it is happening so, I have checked the header of the spam mail and find some things which may be creating problem
Received-SPF: none (domain of abc.com does not designate permitted sender hosts)
dkim=neutral (no sig)
Message-ID: <[email protected]>
I have used mxtool and fond missing reverse dns as well. Whether these are the reasons I am getting my mail in spam or not and How can i solve these issues.