When replying to a craigslist posting, I get the bounce message below and need to know how to fix this.
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <mail.ehclifebuilders.org #5.5.0 smtp;554 <unknown[220.127.116.11]>:
Client host rejected: rDNS/DNS validation failed. Please setup matching DNS and rDNS records: http://bind8nt.meiway.com/itsaDNSmess.cfm
I have these DNS entries set with my ISP:
ehclifebuilders.org. IN MX 5 mail.ehclifebuilders.org.
mail.ehclifebuilders.org. IN A 18.104.22.168
What am I missing?