mozilla/browserid — Issue #456: Verification mail sender host does not have a reverse DNS entry
Author: dc7kr
Created: 2011-10-18 12:01:16+00:00
State: open

NOQUEUE: reject: RCPT from unknown[63.245.208.223]: 450 4.7.1 Client host rejected: cannot find your hostname, [63.245.208.223];

Claims to be browserid1.vm1.labs.sjc1.mozilla.com - as this is a common SPAM check it prevents many SPAM protected mail servers from delivering the email...