On Mon, 11 Aug 2008 11:33:00 -0400 (EDT), Charles Gregory wrote:
it concerns me as to whether these remarks about 'big name' non-compliant MTA's still apply specifically to greylisting. I mean, I can't really imagine a 'big' (fortune 500?) company having an MTA that does not attempt to resend mail if it gets a 400 response from another MTA. I realize they break all sorts of other stuff. Non-compliant 'helo's and all that, but at least please tell me there isn't a 'big' company out there that is failing to handle 4xx codes properly.... (holding breath)
One example is Arcor, a biggish German access provider. Their outgoing mailservers do resend mail on a 4xx error - but only after a delay of eight hours. That sort of delay is quite enough to upset many users. But Arcor's tech support doesn't see a problem with that. They even maintain it's RFC compliant. -- Tilman Schmidt Phoenix Software GmbH Bonn, Germany
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