[Dovecot] spf record

[Matt]

> > Your spf record is broken:
> >
> > dovecot.org.            39942   IN      TXT     "v=spf1 a -all"
>
> Care to tell also why? dovecot.org's mails are sent from the same IP as
> its A record.

Hmmm.  I would have listed mx as well but thats just me.  But just
listing a is likely better in that there are less lookups for the
receiving system.

One thing that bugs me is why we must now implement domainkeys on top
of SPF.  SPF pretty much does everything domainkeys does but simpler.
Implementing domainkeys I hear will require Exim be recompilled on the
machine it needs to be used on too.

http://wiki.exim.org/DomainKeys

Matt