SPF Header - Random domain

[albans]

Hi,

I enabled Qmail (via the PSA admin) to add the SPF Header. It seems to work fine, I could test relevent SPF servers...
But the headers now show random domain.

I explain:
- I host different domains on one IP
- the SPF Header show one of them, even if the domain isn't concerned by the mail

I think this comes from a DNS resolution problem, but I can't figure where... As the reverse DNS of my IP is only set to one domain.

Any ideas? Thanks.

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[beppe.r]

Hi,
I have resolve this remove in the dns zone the ptr record for all domain.
in this mode the sfp answers with hostname server.