cname replace in mail address? [off-topic] (Re: Attn Ronald Klop)

[Jeremy Chadwick]

On Fri, Aug 27, 2010 at 11:22:05AM +0200, Ronald Klop wrote:
> Mandatory? I'm googling, but can't find a document that declares it
> mandatory and only sendmail seems to do it.
> I think it is lame to use DNS info to rewrite e-mail addresses, but
> the person who made it 'mandatory' will have good reasons for it.
> 
> Does somebody have a pointer to the specs about this?

First hit on Google:

http://www.ferris.com/2008/09/08/why-you-shouldnt-mix-cname-and-mx/

Bottom line: don't use CNAMEs, ever, unless you know ***exactly*** what
you're doing.  It's been like this for a very long time.

-- 
| Jeremy Chadwick                                   jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |