> >I understand that you shouldn't have an IP address in your MX, but rather as > >best practice should create an A name > > it's not "best (optional) practice". The MX RDATA field MUST contain a > canonical, FQDN that resolves to an A record. > > >is there an RFC that suggests this, or another reason? > > look up any DNS RFC, they have this ancient, original definition for MX record > > Len
Len, you still have the good information here: http://bind8nt.meiway.com/itsaDNSmess.cfm Perhaps Jim can get the links from there. You reference RFC 1912, "Common DNS Operational and Configuration Errors," which lists the sources for DNS standards. --Eric
