At 11:47 10-03-2008, Bob Proulx wrote:
What would have been the downside of *not* having a backup MX? The
Loss of mail.
mail would have remained in the mailqueue. Comcast, AOL, Yahoo, Gmail, corporate servers, private servers, etc. would have retried to send the mail to you later. When your main mail relay came online they would have retried and delivered it. There would have been NO DIFFERENCE at all. You didn't need your backup MX relay to proxy relay the mail to you.
The difference is that you are making assumptions about their retry strategy. Regards, -sm
