Multiple SPF include mechanismn cause permerror

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http://serverfault.com – I'm currently using 2 providers to send e-Mails and one host which directly sends e-Mails. Personal mails are sent via Google and application generated via a bulk e-mail provider. Both are sent from the same domain (example.com). Google specifies to use this record ("Create SPF records"): v=spf1 include:_spf.google.com ~all The other provider specifies: v=spf1 include:spf.provider.com ?all I created the following TXT record (ip4 value changed): v=spf1 ip4: include:_spf.google.com include:spf.provider.com ?all I have tested this by sending mails via both providers to a Googlemail a (HowTos)