[Pymilter] Unknown mechanism found (bis)

[Arnaud de Prelle]

Dear list member,

Another Permanent Error just popped up for an email coming from the 
domain @vyncke.org :

Jan 15 14:22:38 icecube sm-mta[16147]: t0FDMc8T016147: Milter: 
from=<XXXX at vyncke.org>, reject=550-5.5.2 SPF Permanent Error: Unknown 
mechanism found\r\n550-5.5.2 There is a fatal syntax error in the SPF 
record for vyncke.org\r\n550 5.5.2 We cannot accept mail from vyncke.org 
until this is corrected.
Jan 15 14:22:38 icecube sm-mta[16147]: t0FDMc8T016147: 
from=<XXXX at vyncke.org>, size=3019, class=0, nrcpts=0, proto=ESMTP, 
daemon=MTA-v6, relay=ks.vyncke.org [IPv6:2001:41d0:8:e1a2::1]

Record : "v=spf1 ip4:139.165.0.0/16  ip4:87.98.177.174/32 
ip4:91.121.200.122/32  ip4:178.32.222.162/32 ip4:217.70.178.0/24 
ip6:2001:6a8:2d80::/48 ip6:2001:41D0:1:D17a::/64 ip6:2001:6f8:1468::/48 
ip6:2a02:2788:20::/48 ip6:2001:41d0:8:e1a2::/64 include:edpnet.be -all"

This time, both kitterman's validator and mxtoolbox's validator report 
it as correct :
http://www.kitterman.com/spf/validate.html
"SPF record passed validation test with pySPF (Python SPF library)!"
http://mxtoolbox.com/domain/vyncke.org/?source=findmonitors

This record contains consecutive space characters (2 times) & ip6 
ranges.

Same setup as the one reported in my previous report this week:
http://spidey.bmsi.com/pipermail/pymilter/2015-January/000380.html
Is it linked to the previous issue or is it linked to IPv6 entries ?

Best Regards,
Arnaud.