[CentOS] DKIM

> > Setup proper SPF records for your domain(s) for one.
> 
> That's supposed to help with what regarding his problem? OTOH 
> I have no idea which problem SPF solves anyway other than 
> making it harder for others to use your domain for fake 
> adresses (if receiving mail servers do some sort of check 
> against SPF).
> 
> Ralph

I think google/gmail pays attention to it and they add points for it.