[exim-dev] [Bug 863] New: Dnsdb should support the SPF DNS r…

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Szerző: John Horne
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Címzett: exim-dev
Új témák: [exim-dev] [Bug 863] Dnsdb should support the SPF DNS record
Tárgy: [exim-dev] [Bug 863] New: Dnsdb should support the SPF DNS record
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http://bugs.exim.org/show_bug.cgi?id=863
           Summary: Dnsdb should support the SPF DNS record
           Product: Exim
           Version: 4.69
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: wishlist
          Priority: medium
         Component: Lookups
        AssignedTo: nigel@???
        ReportedBy: john.horne@???
                CC: exim-dev@???



The DNS record type 'SPF' has been available for the past few years. The exim
'dnsdb' lookup should support 'SPF' in the same way that it currently supports
'TXT' (and PTR, A, MX etc).

The ISC BIND DNS resolver has supported the SPF record type since version 9.4,
and although O/S's such as CentOS 5.3 still provide BIND 9.3, it will no doubt
at some point upgrade to 9.4 or above. (BIND itself is at 9.6.1 as the latest
version.)

Similarly, RFC 4408 itself states that (section 3.1.1):

A compliant domain name MUST have a record of at least one type.

'type' being either TXT or SPF record types. Hence, it is perfectly possible,
and valid, for a site to use the DNS SPF record type to advertise it's SPF
records.

Since SPF records relate to email, exims dnsdb lookup should support this type.


NOTE: As far as I can tell, the spf record type is defined to be exactly the
same as the txt type. So I *assume* it should be a question of just duplicating
the current exim txt record handling for spf.


John.


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