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+.TH s/qmail: dnsptr 8
+.SH NAME
+dnsptr
+.SH SYNOPSIS
+.B dnsptr 
+.I IPv4 
+or
+.IR IPv6 .
+.SH DESCRIPTION
+.B dnsptr
+does a DNS
+.I PTR
+lookup and displays the retrieved
+.IR fqdn .
+.SH "EXIT CODES"
+.B dnsptr
+always returns
+.I 0 
+except for wrong IP address 
+formats while returning 
+.IR 100 .
+.SH "SEE ALSO"
+dnscname(8),
+dnsmxip(8),
+dnsfq(8),
+dnsip(8),
+dnstxt(8).