[Pdns-users] Re: How Do SPF records work in PDNS? ( begionner)

2006-11-18 Thread Julian Mehnle
Richard Vernooij wrote:
 I seem to have a problem that many messages from a webserver, or
 emailserver do not arrive on certain places.

 Now i found that it could be the reason, that i do not have SPF records
 for reverse DNS.

SPF has _nothing_ to do with reverse DNS.

 Now when i check
 http://www.dnsreport.com/tools/dnsreport.ch?domain=domainname.com (after
 a day with the real domain)

 I still have a warning about not having a spf record.

Well, then your domain does not have an SPF record.

Did you add a record of type SPF to your domain's zone?



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Re: [Pdns-users] Re: How Do SPF records work in PDNS? ( begionner)

2006-11-18 Thread Richard Vernooij
I thought PRT record is the same? or do i misundertand. Can you please explain 
the difference? and what must i do in my case? 

In my case several people do not get any mail, because there spamfilter blocks 
mail from our domains on our servers, due to Reverse or SPF settings . This is 
all i can understand, form the error messages.


In my Power admin is no such thing as a SPF TYPE.  only PRT / TXT etc.. 


I hope it is clear enough for you guys? 

Please let me know.


thanks,

Richard.

Richard Vernooij wrote:
 I seem to have a problem that many messages from a webserver, or
 emailserver do not arrive on certain places.

 Now i found that it could be the reason, that i do not have SPF records
 for reverse DNS.

SPF has _nothing_ to do with reverse DNS.

 Now when i check
 http://www.dnsreport.com/tools/dnsreport.ch?domain=domainname.com (after
 a day with the real domain)

 I still have a warning about not having a spf record.

Well, then your domain does not have an SPF record.

Did you add a record of type SPF to your domain's zone?
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Re: [Pdns-users] Re: How Do SPF records work in PDNS? ( begionner)

2006-11-18 Thread Michael Loftis



--On November 18, 2006 11:27:26 AM -0800 Richard Vernooij 
[EMAIL PROTECTED] wrote:







I thought PRT record is the same? or do i misundertand. Can you please
explain the difference? and what must i do in my case?


I am going to assume you mean PTR record.  PTR's really only occur in 
.in-addr.arpa zones.  They are for reverse DNS which is not SPF.  Many 
sites do require *VALID* reverse DNS nowadays though, which is very 
different from SPF (which I'll get to in a moment).  A *VALID* rDNS 
consists of a PTR in your providers .in-addr.arpa zone, as well as a 
matching A record that it points to (PTR means PoinTeR).


SPF is simply a specially formatted TXT record associated with the sending 
domain which states which A, MX, or IP's can send mail on behalf of that 
domain.  If you've got people denying mail because of no SPF record well 
you don't want to send mail to them anyway.  SPF is seriously broken in the 
face of *many* everyday applications, including mailing lists, and remote 
dialup users.


Now if you *have* an SPF record (which again is *NOT* a type of DNS record 
at all, it's a TXT record) and that SPF record is *wrong* I can see some 
net.kook's denying mail based on that.




In my case several people do not get any mail, because there spamfilter
blocks mail from our domains on our servers, due to Reverse or SPF
settings . This is all i can understand, form the error messages.


In my Power admin is no such thing as a SPF TYPE.  only PRT / TXT etc..


I hope it is clear enough for you guys?

Please let me know.


thanks,

Richard.

Richard Vernooij wrote:

I seem to have a problem that many messages from a webserver, or
emailserver do not arrive on certain places.

Now i found that it could be the reason, that i do not have SPF records
for reverse DNS.


SPF has _nothing_ to do with reverse DNS.


Now when i check
http://www.dnsreport.com/tools/dnsreport.ch?domain=domainname.com (after
a day with the real domain)

I still have a warning about not having a spf record.


Well, then your domain does not have an SPF record.

Did you add a record of type SPF to your domain's zone?
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[Pdns-users] Re: How Do SPF records work in PDNS? ( begionner)

2006-11-18 Thread Julian Mehnle
Michael Loftis wrote:
 SPF is simply a specially formatted TXT record associated with the
 sending domain which states which A, MX, or IP's can send mail on behalf
 of that domain.  If you've got people denying mail because of no SPF
 record well you don't want to send mail to them anyway.  SPF is
 seriously broken in the face of *many* everyday applications, including
 mailing lists, and remote dialup users.

I don't want to make this into a discussion about the merits of SPF, 
however, what you say isn't true.  SPF has no problems whatsoever with 95% 
of all mailing lists.  The problem that SPF has is with alias-style 
forwarding (where the forwarder simply forwards the mail with the MAIL 
FROM identity unchanged).  Almost all mailing lists do rewrite the MAIL 
FROM when distributing messages, so there isn't any problem.

About remote dial-up users, I assume you are complaining that they can no 
longer use SPF-protected domains for sending mail directly from their 
dial-up connections.  All I can say to that is, well, that this is exactly 
the point of SPF.  SPF gives owner controls over who can use their domains 
in e-mail.  Complain to them, not to SPF.  Don't shoot the messenger.

To learn more about SPF and correct their misconceptions, I recommend that 
people actually read the SPF website[1] instead of propagating myths.

 Now if you *have* an SPF record (which again is *NOT* a type of DNS
 record at all, it's a TXT record) and that SPF record is *wrong* I can
 see some net.kook's denying mail based on that.

Right.  Whatever.

References:
 1. http://new.openspf.org



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Re: [Pdns-users] Re: How Do SPF records work in PDNS? ( begionner)

2006-11-18 Thread Alex van den Bogaerdt
On Sat, Nov 18, 2006 at 12:49:44PM -0700, Michael Loftis wrote:

 Now if you *have* an SPF record (which again is *NOT* a type of DNS record 
 at all, it's a TXT record)

Please be aware that there is an official SPF resource record.
http://www.iana.org/assignments/dns-parameters

But do publish TXT records for your SPF rules as well.  The RR is brand
new and isn't used that much yet.  Eventually only the SPF resource record
is going to be used.  This will take time.

Let's not discuss SPF here.  If you want to know why it is the user's
fault and not the SPF record's fault, let's meet on the spf-discuss
mailing list.

Alex
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