Milter-greylist

> > This is:
> >         priv->priv_spf_header =
> > strdup(spf_response->received_spf_value);
> >
> > Most likely received_spf_value is NULL, or perhaps invalid.
> 
> Could you provide the information from your core? In gdb:
> frame 2
> print spf_response
> print spf_response->received_spf_value
> 

Here it is:

(gdb) frame 2
#2  0x0000000000410708 in spf_check_internal (ad=0x1b574168, as=<value optimized out>, ap=<value optimized out>, priv=0x1bc74a30)
    at spf.c:469
469		priv->priv_spf_header = strdup(spf_response->received_spf_value);
(gdb) print spf_response 
$1 = (SPF_response_t *) 0x2afcf8a736e0
(gdb) print spf_response->received_spf_value 
$2 = 0x0
(gdb)