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Re: 451 Could not complete sender verify callout

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Subject: Re: 451 Could not complete sender verify callout
From: "Matthew R. Dempsky" <mrd@alkemio.org>
Date: Tue, 30 Jan 2007 10:02:32 -0600
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In-reply-to: <45BF653F.3070503@dotcomholdingsofbuffalo.com>
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References: <45BF5CEA.706@dotcomholdingsofbuffalo.com> <20070130151033.GA25863@odin.dempsky.org> <45BF653F.3070503@dotcomholdingsofbuffalo.com>
On Tue, Jan 30, 2007 at 10:33:19AM -0500, Phil Breskey wrote:
> krudmart.com is the main one.

krudmart.com uses EXIM and presumably has sender address verification
enabled.  In response to sending mail, they check if your mail server
accepts an envelope from <> to your sender.

By default, Exim has a timeout of 30 seconds, and your mail server
seems to delay the SMTP greeting by about 30 seconds.

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