[eUKhost.com]

Reverse DNS settings have been changed and the changes should propagate in next 12 - 24 hours.

Reason why you never got all those replies can be explained by following logs :-

2006-11-21 09:47:25 1GmXps-00006O-Jk ** eukhost@yourdomain.net R=lookuphost T=remote_smtp: SMTP error from remote mail server after RCPT TO:: host yourdomain.net [your.ip.add.ress]: 550-Message rejected because server06.specialservers.com [64.38.57.90] is\n550-blacklisted at bl.spamcop.net see Blocked - see\n550
www. spamcop.net/bl.shtml?64.38.57.90
2006-11-21 12:48:50 1GmafS-0002Qx-Hg ** eukhost@yourdomain.net R=lookuphost T=remote_smtp: SMTP error from remote mail server after RCPT TO:: host yourdomain.net [your.ip.add.ress]: 550-Message rejected because server06.specialservers.com [64.38.57.90] is\n550-blacklisted at bl.spamcop.net see Blocked - see\n550
www. spamcop.net/bl.shtml?64.38.57.90
2006-11-21 12:52:36 1Gmaj4-0002gj-Nx ** eukhost@yourdomain.net R=lookuphost T=remote_smtp: SMTP error from remote mail server after RCPT TO:: host yourdomain.net [your.ip.add.ress]: 550-Message rejected because server06.specialservers.com [64.38.57.90] is\n550-blacklisted at bl.spamcop.net see Blocked - see\n550
www. spamcop.net/bl.shtml?64.38.57.90
2006-11-21 12:54:11 1Gmakd-0002ls-Qi ** eukhost@yourdomain.net R=lookuphost T=remote_smtp: SMTP error from remote mail server after RCPT TO:: host yourdomain.net [your.ip.add.ress]: 550-Message rejected because server06.specialservers.com [64.38.57.90] is\n550-blacklisted at bl.spamcop.net see Blocked - see\n550
www. spamcop.net/bl.shtml?64.38.57.90

Your webhost considers our helpdesk server as blacklisted in spamcop.net but its not. Our helpdesk server is used for sending ticket replies only and there is no other outgoing mailservice on the server so there should be no reason for its blacklisting.