If the MX records are not responsive / timing out, they might be falling back to the A record.
On Thu, Jul 26, 2012 at 12:44 PM, Lou Katz <l...@metron.com> wrote: > One of my users has reported incoming mail failures, which I finally > tracked down. It turned out that Hotmail has seen fit to send the mail > to his domain's A record machine, despite the fact that he has valid MX > records. > > The A record points to my webserver, which does not normally accept mail > for anyone. The mail server MX records are to an entirely different > machine. > -- Suresh Ramasubramanian (ops.li...@gmail.com)
