Intermittent Relay problems

5 Apr 2006 1:43 PM

Scott Abel

I have an issue that is driving me nuts. Exchange 2003 with an SMTP
connector forwarding internet mail to a smarthost in the DMZ which is a
Windows 2003 SMTP server (not exchange). Users are complaining that when
sending emails they sometimes receive the following message

The following recipient(s) could not be reached:

      x**@xxxx.com on 4/5/2006 8:23 AM
            You do not have permission to send to this recipient. For
assistance, contact your system administrator.
            <xxx.xxx.net #5.7.1 smtp;550 5.7.1 Unable to relay for
x**@xxx.com>

Now the really weird thing is that if they wait 5, 10 ,15 minutes and then
resend it will go through. Sometimes it might fail a few times in a row but
eventually it succeeds. I have checked all the configurations over and over
and everything looks good. I do not know where to go with this and
management is looking for answers.

Any support or suggestions on this would be invaluable.

Thanks!

Scott

6 Apr 2006 11:16 PM

Ed

Why not allow Exchange just to deliver outbound directly?

I'm guessing that the problem is actually the destination domain. I'd guess
that there's a MX record listed that doesn't work for them.

Show quote

"Scott Abel" <ScottA***@discussions.microsoft.com> wrote in message
news:79D434F4-14C4-4F41-8114-2E1949F02E16@microsoft.com...
>I have an issue that is driving me nuts. Exchange 2003 with an SMTP
> connector forwarding internet mail to a smarthost in the DMZ which is a
> Windows 2003 SMTP server (not exchange). Users are complaining that when
> sending emails they sometimes receive the following message
>
> The following recipient(s) could not be reached:
>
>      x**@xxxx.com on 4/5/2006 8:23 AM
>            You do not have permission to send to this recipient. For
> assistance, contact your system administrator.
>            <xxx.xxx.net #5.7.1 smtp;550 5.7.1 Unable to relay for
> x**@xxx.com>
>
> Now the really weird thing is that if they wait 5, 10 ,15 minutes and then
> resend it will go through. Sometimes it might fail a few times in a row
> but
> eventually it succeeds. I have checked all the configurations over and
> over
> and everything looks good. I do not know where to go with this and
> management is looking for answers.
>
> Any support or suggestions on this would be invaluable.
>
> Thanks!
>
> Scott

7 Apr 2006 1:07 AM

Scott Abel

There are too many domains that this affects for it to be the destinations
issue. One thing I did find out is that we are running fixup smtp protocol
on the PIX. I'm going to see about getting it disabled

Show quote

"Ed" wrote:

> Why not allow Exchange just to deliver outbound directly?
>
> I'm guessing that the problem is actually the destination domain. I'd guess
> that there's a MX record listed that doesn't work for them.
>
>
> "Scott Abel" <ScottA***@discussions.microsoft.com> wrote in message
> news:79D434F4-14C4-4F41-8114-2E1949F02E16@microsoft.com...
> >I have an issue that is driving me nuts. Exchange 2003 with an SMTP
> > connector forwarding internet mail to a smarthost in the DMZ which is a
> > Windows 2003 SMTP server (not exchange). Users are complaining that when
> > sending emails they sometimes receive the following message
> >
> > The following recipient(s) could not be reached:
> >
> >      x**@xxxx.com on 4/5/2006 8:23 AM
> >            You do not have permission to send to this recipient. For
> > assistance, contact your system administrator.
> >            <xxx.xxx.net #5.7.1 smtp;550 5.7.1 Unable to relay for
> > x**@xxx.com>
> >
> > Now the really weird thing is that if they wait 5, 10 ,15 minutes and then
> > resend it will go through. Sometimes it might fail a few times in a row
> > but
> > eventually it succeeds. I have checked all the configurations over and
> > over
> > and everything looks good. I do not know where to go with this and
> > management is looking for answers.
> >
> > Any support or suggestions on this would be invaluable.
> >
> > Thanks!
> >
> > Scott
>
>
>