my has problems sending mail to earthlink.net the sever has a ptr abd reverse dns set but i get this To: jimmy@horsezipsworld.com Subject: Message undeliverable: MegaBBS Forum horsezip's world : New user alert From: mailer-daemon@horsezipsworld.com Date: Sun, 20 May 2018 23:40:41 -0400 Your message did not reach some or all of the intended recipients. Sent: Sun, 20 May 2018 23:40:40 -0400 Subject: MegaBBS Forum horsezip's world : New user alert The following recipient(s) could not be reached: horsezip@earthlink.net Error Type: SMTP Remote server (209.86.93.228) issued an error. hMailServer sent: MAIL FROM:<jimmy@horsezipsworld.com> Remote server replied: 550 ERROR: No or mismatched reverse DNS (PTR) entries for 23.227.197.10 hMailServer any one here who can help my server sends mail to servers fine gmail etc jimmy