Re: [courier-users] Courier and rfc 4408 spf

[Sam Varshavchik]

mariobe...@bol.com.br writes:

« HTML content follows »

Hi,
 


Domain: algartelecom.com.br

TXT record:


0.225.197.0/24 ip4: 200 225 223 133 ip4: 201.16.216.25 ip4: 201.48.140.94 "

n.outlook.com include: spf.virtualtarget.com.br a mx -all "

Error courier:



http://tools.ietf.org/html/rfc4408#section-3.1.4
 

The problem occurs when the domain is in your SPF record on multiple lines for the TXT record.          "v = spf1 ip4: 189.112.116.20 ip4: 200.170.137.98 ip4: 200 170 169 128 ip4: 20          "include: 17386.meuspf.com include: 21316.meuspf.com include: spf.protectio Nov 3 12:38:07 mail courieresmtpd: error, relay = :: ffff: 65.55.169.54, from = <marc...@algartelecom.com.br>: 517 SPF neutral marc...@algartelecom.com.br: Address does not pass the Sender Policy Framework <URL:http://tools.ietf.org/html/rfc4408#section-3.1.3>3.1.3. Multiple Strings in a Single DNS record

   As defined in [<URL:http://tools.ietf.org/html/rfc1035>RFC1035] sections < URL:http://tools.ietf.org/html/rfc4408#section-3.3.14>3.3.14 and <URL:http:// tools.ietf.org/html/rfc4408#section-3.3>3.3, a single text DNS

   record (either TXT or SPF RR types) can be composed of more than one
   string.  If a published record contains multiple strings, then the
   record MUST be treated as if those strings are concatenated together
   without adding spaces.  For example:

      IN TXT "v=spf1 .... first" "second string..."

   MUST be treated as equivalent to

      IN TXT "v=spf1 .... firstsecond string..."

   SPF or TXT records containing multiple strings are useful in
   constructing records that would exceed the 255-byte maximum length of
   a string within a single TXT or SPF RR record.


How to fix this error?

The SPF resolver in Courier does not yet implement multiple strings. RFC 4408 is relatively new, and not all mail servers support it, yet.

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