On 01/09/2019 07:58 AM, John Levine wrote:
Sounds like it'd be more useful to persuade those domains to publish a null MX. Then everyone's mail to them will fail automagically.
Agreed.However that requires that the domains still be registered and having DNS service.
Granted, MTAs should refuse to accept email for non-existent domains. But we all know that there are a LOT of MTAs that don't do things the way that they should.
-- Grant. . . . unix || die
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