Unable to Receive E-mail 550 Error

My MX Records for my domain theinnocentbystanders.com appears to be correctly pointed toward Zoho mail. But I am receiving this error message from my domain host:

Mis-matched Glue

The glue provided by your nameservers does not match the IP(s) provided by the MX records authoritative nameservers. This may result in intermittent delivery problems. The remainder of this test will focus on the authoritative answer. The mis-matched records are:

The following MX record IP(s) have proper PTR (rDNS) records:

rDNS

69.162.80.57

57-80-162-69.static.reverse.lstn.net.

MX Record IPs Have rDNS Records

One or more of your MX record IP addresses has no corresponding reverse DNS entry (PTR record). If this MX is used to send outgoing mail this will cause it to trip anti spam filters. Many SMTP servers will not accept mail from an IP with no reverse DNS. The following MX entries lack rDNS.

Here is the error message I receive in the sending e-mail account:

gator3286.hostgator.com rejected your message to the following email addresses:

info@theinnocentbystanders.com (info@theinnocentbystanders.com)
Your message couldn't be delivered and there was no valid enhanced status code being issued by the remote mail system to determine the exact cause, status: '550-Please turn on SMTP Authentication in your mail client, or login to the 550-IMAP/POP3 server before sending your message. 550-216-70-227-155.static-ip.telepacific.net (mail.tjsl.edu) 550-[216.70.227.155]:62115 is not permitted to relay through this server 550 without authentication.'.

gator3286.hostgator.com gave this error:
Please turn on SMTP Authentication in your mail client, or login to the IMAP/POP3 server before sending your message. 216-70-227-155.static-ip.telepacific.net (mail.tjsl.edu) [216.70.227.155]:62115 is not permitted to relay through this server without authentication.