> Yes, and thankfully these days it's fairly easy. If performance is an
> issue you might want to lean towards libspf2 rather than Mail::SPF
> (the reference implementation). A full list of milters and other
> resources for setting up SPF (howtos etc) is here:
[...]
Thank you!
I tried before on SL 4.5, but got lost trying to resolve failed
dependencies when installing the necessary packages. I'll give it
another try - now with SL 5.1.
Miguel A. Lerma