Re: Re-post: SMTP 550 - Sender not allowed
From: Jeff Mackeny (me_at_me.com)
Date: 08/19/04
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Date: Thu, 19 Aug 2004 14:55:33 -0400
Dave, what's the user account settings in outlook, where does the MX or A
record for the source domain point to, can you explain in a little more
details how DNS and SMTP is set up between the exchange and WorldSecure
server.
"Dave Woolley" <dvwool@ix.netcom.com> wrote in message
news:c0b5e73d.0408181626.516c343e@posting.google.com...
> This is a re-post... I originally posted this on 6/17/04 but didn't
> get any response. I'm still experiencing this problem... does anyone
> have an idea what might be causing it...
>
> Thanks in advance for your help!
> -Dave
>
>
> Hello,
>
> I'm trying to figure out a sporadic e-mail problem that has been
> occurring for us for a few months now. Here's our setup...
>
> - one Exchange 2000 server
> - single AD domain environment
> - e-mail routed through Internet T1 by default
> - Exchange is configured to route e-mail to some specific domains
> through a backend T1... a partner has a WorldSecure server that acts
> as a mail hub for all of those domains.
>
> About 25% of the time, sending e-mail to one of the "specially-routed"
> domains results in the undeliverable message at the end of my post.
> I've done some testing and the problem doesn't seem to be related to
> time of day, content, or length of message. In researching newsgroup
> postings, I read about reverse DNS being a possible issue, but I'm
> sure that reverse DNS is set up properly for us.
>
> Something that dawned on me... the partner that acts as the mail hub
> switched us from a frame relay to a T1-VPN around the time that the
> problems started occurring... is it possible that it's a problem with
> the access list on their new router or something like that?
>
> Any thoughts would be much appreciated.
> Thanks!
> -Dave
>
> ===================================================================
> Your message did not reach some or all of the intended recipients.
>
> Subject: Test
> Sent: 6/10/2004 12:49 PM
>
> The following recipient(s) could not be reached:
>
> 'user@otherdomain.com' on 6/10/2004 12:49 PM
> There was a SMTP communication problem with the
> recipient's email server. Please contact your system administrator.
> <mailserver.mydomain.com #5.5.0 smtp;550 Requested action
> not taken - Sender not allowed>
> ===================================================================
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