I found some information on this page:
https://postmaster.aol.com/error-codes (under "other errors")
Quote:
Originally Posted by AOL
AOL will not accept delivery of this message
This is a permanent bounce due to: - RFC2822 From domain does not match the rDNS of sending server.
- RFC 2822 FROM address does not have an A record and is not a valid domain.
- IP has a poor reputation and mail is sent to multiple recipients.
- There are multiple From address in the mail headers and the IP reputation is poor.
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Maybe that will help you out.
If that doesn't help you out, you can attempt to create a ticket
here in order to reach out to AOL. (under "other issues")
I would also do a blacklist check here:
http://mxtoolbox.com/blacklists.aspx and run diagnostics here:
http://mxtoolbox.com/diagnostic.aspx. That shows that your reverse DNS is not a valid hostname.
Quote:
Originally Posted by mxtoolbox
Your Reverse DNS Record (PTR) is not a valid host name. According to email sending best practices, a PTR Record should be a valid host name. If the PTR Record is not a valid hostname, there is a likelihood that you will experience email delivery issues with anti-spam services.
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