As an admin I would assume this as spammers trying to get some emails and I
would block this on the firewall.
----- Original Message -----
From: "Michael Sims" <michaels@xxxxxxxxxxxxxx>
To: <php-general@xxxxxxxxxxxxx>
Sent: Wednesday, September 21, 2005 4:22 PM
Subject: RE: email validation (no regex)
Jim Moseby wrote:
There's no requirement for an MX-record, so you'd need to check the
A-record ($domain) too.
Excellent answer. No requirement for MX record?
[showing my ignorance]
How does email routing happen if there is no mail exchanger in the
zonefile for a particular domain?
[/ignorance]
Most all mail transfer agents will fall back to looking for an A record if
an MX
record doesn't exist. It's good practice to define an MX record but it
isn't
required...
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