MX Records reliable

Steve smorrey at
Thu Apr 5 15:28:15 MDT 2007

A lot of people with for instance personal domain names, such as don't know enough to setup an MX record.
In many cases if an mx cannot be found the email system will query the
nameserver for an A record and pass the mail to that server.  So I
would do a double check.  First check to see if there is an MX record
and if that fails then check for an A record.

On 4/5/07, Stuart Jansen <sjansen at> wrote:
> On Thu, 2007-04-05 at 15:16 -0600, Daniel wrote:
> > I have a form where people can submit feedback to the webmaster.  I
> > want to make sure I can reply to the patron.  Would I get most of my
> > patrons verified if I check for an MX Record for the email address
> > they provide?
> As long as you're willing to accept that some people will get mad
> because their domain only publishes an A record or their DNS is
> temporarily unreachable. The first is technically incorrect and the
> second might not be your fault, but you might want to think carefully
> about what to do if the test fails. Maybe allow the address anyway, but
> warn the user "Please double check your email address. It may be wrong,
> or the Internet might have hiccuped."
> --
> Stuart Jansen              e-mail/jabber: sjansen at
>                            google talk:   stuart.jansen at
> "However beautiful the strategy, you should occasionally look at
> the results." -- Winston Churchill
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