I have traced the problem to DNS records for LiteSpeedTech.Com. Even though the ISP, the planet, has the corrent DNS records, they have not been correctly propagated in the last 24 hours or so. Confimred by two sources:
Source from the origin:
http://www.dnsstuff.com/tools/lookup.ch?name=litespeedtech.com&type=MX
Everything looks good.
DNS from my own systems:
Apr 22 17:46:11 localhost postfix/smtp[17625]: EE7D641DF02: to=<info@litespeedtech.com>, relay=none, delay=4, status=deferred (Name service error for name=litespeedtech.com type=MX: Host not found, try again)
Apr 22 18:08:50 localhost postfix/smtp[22953]: EE7D641DF02: to=<info@litespeedtech.com>, relay=none, delay=1363, status=deferred (Name service error for name=litespeedtech.com type=MX: Host not found, try again)
dig also shows no recrods for litespeedtech.com for some reason.
I believe the delivery report from @mac.com server also encountered the same DNS record resolution problem. I tried to send email to
info@litespeedtech.com through both @mac.com and one from my own @fantasyball.net and both encountered errors.
ThePlanet might have some DNS propagation/permission issues in the past 24 hours.