  Consider a linear functional $L$ defined on the space $\mathcal D[s]$ of
Dirichlet polynomials with real coefficients and the set $\mathcal D_+[s]$ of
non-negative elements in $\mathcal D[s].$ An analogue of the Riesz-Haviland
theorem in this context asks: What are all $\mathcal D_+[s]$-positive linear
functionals $L,$ which are moment functionals? Since the space $\mathcal D[s],$
when considered as a subspace of $C([0, \infty), \mathbb R),$ fails to be an
adapted space in the sense of Choquet, the general form of Riesz-Haviland
theorem is not applicable in this situation. In an attempt to answer the
forgoing question, we arrive at the notion of a moment sequence, which we call
the Hausdorff log-moment sequence. Apart from an analogue of the Riesz-Haviland
theorem, we show that any Hausdorff log-moment sequence is a linear combination
of $\{1, 0, \ldots, \}$ and $\{f(\log(n)\}_{n \geqslant 1}$ for a completely
monotone function $f : [0, \infty) \rightarrow [0, \infty).$ Moreover, such an
$f$ is uniquely determined by the sequence in question.
