Since 2013 (the intro of Azure) Microsoft has been saying that Azure doesn't support PTR records. This is very important to the security of email. I have stood up a server and purchased a certificate just to find out that Microsoft doesn't support the PTR record.
It's nearly 2016. When can we honestly expect the PTR record? I'm tired of telling people to look at the SPAM/JUNK mail in order to find the email that I sent them. I'm constantly over-looked because of this.