On Sun, 21 Sep 2003 16:00:47 EDT, Dean Anderson <dean@av8.com> said: > It never sends the email in either case. In the first case, it will say no > such host, and return an error to the user. In the second case, it will > attempt to connect to 64.94.110.11 and will get an error, which will be > returned to the MUA. So if a domain gets shelved by accident, as happened to one NANOG poster this weekend, all their mail gets sucked up and handed a 5xx error by the Verisign server and bounced, rather than getting hit with a 4xx and retried for a few days.
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