[exim] Is this a bug?

[Marc Perkel]

accept    !dnslists = +defer_unknown : 
rb.junkemailfilter.com/$acl_c_rb_query
    message = DEFER - Registry Barrier DNS read error - Try again later

Generates an error:

ACL "warn" with "message" setting found in a non-message (connection) 
ACL: cannot specify header lines here:

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