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Problem with DNS Reverse MX and how configure SPF
https://forum.linode.com/viewtopic.php?f=19&t=1932		 Page 1 of 1
Author:  isaac43 [ Fri Oct 28, 2005 4:57 pm ]
Post subject:  Problem with DNS Reverse MX and how configure SPF
hi im dont speak english good, i have any question, i have a server in Linux mandriva 10, Postfix mail server, BIND, www.cyberchiriqui.com, but the DNS reverse MX , cant find the message is: server cant find 34.94.225.201.in-addr.arpa.

my named.conf is:
options {
directory "/etc";
pid-file "/var/run/named/named.pid";
};

zone "." {
type hint;
file "/etc/db.cache";
};

zone "local" {
type master;
file "named.local";
allow-update { none; };
};

zone "127.in-addr.arpa" {
type master;
file "named.inversa";
};

server 201.225.225.225 {
};

zone "cyberchiriqui.com" {
type master;
file "/etc/named.hosts";
allow-update { none; };
};


zone "201.in-addr.arpa" {
type master;
file "/etc/named.reverse";
};

master named.hosts ---- www.cyberchiriqui.com
$ORIGIN cyberchiriqui.com
$TTL 86400
@ IN SOA www.cyberchiriqui.com. mail.cyberchiriqui.com. (
15
604800
86400
2419200
604800 )

cyberchiriqui.com. IN NS www.cyberchiriqui.com.
IN NS www.panamacom.com.

localhost A 127.0.0.01

cyberchiriqui.com. IN A 201.225.94.34
dns.cyberchiriqui.com. IN A 201.225.94.34
IN MX 10 mail.cyberchiriqui.com
IN MX 20 mx2.cyberchiriqui.com.
ns1 IN A ns1.cyberchiriqui.com
ns2 IN A ns2.cwpanama.net
cyberchiriqui.com. IN TXT "v=spf1 ~all"
www IN CNAME cyberchiriqui.com.
mail IN CNAME cyberchiriqui.com.

www.cyberchiriqui.com. IN A 201.225.94.34

my reverse name.hosts

@ IN SOA cyberchiriqui.com. mail.cyberchiriqui.com. (
5
604800
86400
2419200
604800 )


34.94.225.201.in-addr.arpa. IN PTR cyberchiriqui.com.

Please help me, and i like to configure SPF but i have a group newsletter and the email send in ANTI-SPAM directory.

Thanks
Author:  mikegrb [ Fri Oct 28, 2005 5:05 pm ]
Post subject: 
You need to speak to the ISP responsible for the IP address, Cable & Wireless Panama, and ask them to provide reverse DNS. Since you aren't responsible for the address block the IP is in, nobody's DNS server is going to ask yours what the reverse DNS should be.
Author:  sednet [ Sat Oct 29, 2005 9:56 am ]
Post subject:  Re: Problem with DNS Reverse MX and how configure SPF
Like mikegrb said the people that own your IP address will have to do the PTR.
If your mail server PTR doesn't exist your mail may well get filtered by spamassassin and others.

Also:
isaac43 wrote:
IN MX 10 mail.cyberchiriqui.com
IN MX 20 mx2.cyberchiriqui.com.
...
mail IN CNAME cyberchiriqui.com.


Don't use a CNAME for a mail server, The RFC's say it has to be an A record.
And mx2 is missing.
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