gusl | my email forwarding was broken (but is now fixed) (Reply)

This Saturday, buydomains.com stopped forwarding my email to the right place. It happened as soon as I changed my nameservers from vivhost.net to siteground.com. I assumed, incorrectly, that only web service was being changed. The last time I changed nameservers, this was not a problem.

I had no warning, and 3 days worth of email went up in smoke due to this (unless siteground is reasonable about storing bounced messages for a few days). To fix it, the buydomains support guy told me to check some cryptic box that means email service remains with the registrar (i.e. buydomains).

Since this change takes time to propagate, I went to siteground and added forwarding for my most important addresses.

To be fair, my daily Gmail Alerts was complaining about bounces. I should have taken it as a warning.
Here's the header:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

gmail(at)optimizelife dotcom
No Such User Here

------ This is a copy of the message, including all the headers. ------

Return-path: <gustavo.lacerda+caf_=gmail=optimizelife.com@gmail.com>
Received: from wa-out-1112.google.com ([209.85.146.178]:25491)
by serv01.siteground226.com with esmtp (Exim 4.68)
(envelope-from <gustavo.lacerda+caf_=gmail=optimizelife.com@gmail.com>)
id 1JWOfD-0003oy-HG
for gmail@optimizelife.com; Mon, 03 Mar 2008 22:22:03 -0600
Received: by wa-out-1112.google.com with SMTP id j5so454181wah.15
for <gmail@optimizelife.com>; Mon, 03 Mar 2008 20:22:00 -0800 (PST)
Received: by 10.114.107.19 with SMTP id f19mr1290611wac.113.1204604520688;
Mon, 03 Mar 2008 20:22:00 -0800 (PST)