On Mon, Jul 26, 2004 at 11:56:02AM +0000, Patrick Mackinlay wrote:
| Hello,
|
| I am writing to you regarding your SPF perl module. I am using this module
| in conjunction with postfix and it works fine. However there is a
| problem with the trusted forwarders functionality. Some of the trusted rules
| require a reverse DNS lookup on the clients IP address. As I am sure you know
| many people do not publish PTR records for their hosts, this results in
| the SPF lookup failing with a DNS error, resulting in the email being
| deferred (450 temporary DNS error ....). Since the error is not really
| temporary (i.e. the PTR record is not likely to appear!) then the email
| is deferred until the peer decides to give up. Perhaps it would be wiser
| for PTR DNS errors, whilst evaluating trusted forwarder rules, resulting in a
| neutral SPF result. As it stands I have to turn of the trusted forwarder
| functionality, since it ultimately means rejecting all email from hosts
| without PTR records.
|
| regards,
| Patrick
|
| --
| Patrick Mackinlay patrick@spacesurfer.com
| http://patrick.spacesurfer.com/ tel: +44.7050699851
| Yahoo messenger: patrick00_uk fax: +44.7050699852
| SpaceSurfer Limited http://www.spacereg.com/
|
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| Hello,
|
| I am writing to you regarding your SPF perl module. I am using this module
| in conjunction with postfix and it works fine. However there is a
| problem with the trusted forwarders functionality. Some of the trusted rules
| require a reverse DNS lookup on the clients IP address. As I am sure you know
| many people do not publish PTR records for their hosts, this results in
| the SPF lookup failing with a DNS error, resulting in the email being
| deferred (450 temporary DNS error ....). Since the error is not really
| temporary (i.e. the PTR record is not likely to appear!) then the email
| is deferred until the peer decides to give up. Perhaps it would be wiser
| for PTR DNS errors, whilst evaluating trusted forwarder rules, resulting in a
| neutral SPF result. As it stands I have to turn of the trusted forwarder
| functionality, since it ultimately means rejecting all email from hosts
| without PTR records.
|
| regards,
| Patrick
|
| --
| Patrick Mackinlay patrick@spacesurfer.com
| http://patrick.spacesurfer.com/ tel: +44.7050699851
| Yahoo messenger: patrick00_uk fax: +44.7050699852
| SpaceSurfer Limited http://www.spacereg.com/
|
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