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Home > Archive > IIS and SMTP > June 2005 > Exch 2003 #5.5.0 smtp;553 + unable to verify address
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Exch 2003 #5.5.0 smtp;553 + unable to verify address
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| Hi, I've got a problem sending mails to domains hosted by some ISP's. The
mail cannot be delivered and the error message is something like this
(SMARTHOST is our ISP smtp relay , RECIPIENT is recipient (doh), DOMAIN is
recipients domain and LOCALDOMAIN is the Exchangeservers local domain):
**** snip ****
This is the Postfix program at host SMARTHOST.
I'm sorry to have to inform you that your message could not be be delivered
to one or more recipients. It's attached below.
For further assistance, please send mail to <postmaster>
If you do so, please include this problem report. You can delete your own
text from the attached returned message.
The Postfix program
<RECIPIENT@DOMAIN>: host mailgw1.tiscali.dk[212.54.64.159] said: 553
<SENDER@LOCALDOMAIN> unable to verify address (in reply to MAIL FROM
command)
**** snip ****
The DNS is correctly configured, also there is a reverse lookup zone for the
domain. This problem only occurs while sending from the Exchange 2003 server,
sending from Exchange 2000 is no problem, and various Linux based MTA's has
no problems.
any suggestions?
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| Peter Karsai 2005-06-01, 7:48 am |
| Hello,
Postfix can do "sender callout verifications", which means that if someone
tries to send email in the name of john@example.org to a Postfix server, it
connects back to the MX of example.org and initiates mail sending to
john@example.org. If it fails, Postfix assumes that the sender was invalid.
Most likely the problem is that the sender is in format john@LOCALDOMAIN,
from which the "LOCALDOMAIN" zone cannot be resolved by the Postfix MTA.
Peter
"MrDk" <MrDk@discussions.microsoft.com> wrote in message
news:E42ED105-F023-44AA-84AE-B4C7957F1946@microsoft.com...
> Hi, I've got a problem sending mails to domains hosted by some ISP's. The
> mail cannot be delivered and the error message is something like this
> (SMARTHOST is our ISP smtp relay , RECIPIENT is recipient (doh), DOMAIN is
> recipients domain and LOCALDOMAIN is the Exchangeservers local domain):
>
> **** snip ****
>
> This is the Postfix program at host SMARTHOST.
>
> I'm sorry to have to inform you that your message could not be be
> delivered
> to one or more recipients. It's attached below.
>
> For further assistance, please send mail to <postmaster>
>
> If you do so, please include this problem report. You can delete your own
> text from the attached returned message.
>
> The Postfix program
>
> <RECIPIENT@DOMAIN>: host mailgw1.tiscali.dk[212.54.64.159] said: 553
> <SENDER@LOCALDOMAIN> unable to verify address (in reply to MAIL FROM
> command)
>
> **** snip ****
>
> The DNS is correctly configured, also there is a reverse lookup zone for
> the
> domain. This problem only occurs while sending from the Exchange 2003
> server,
> sending from Exchange 2000 is no problem, and various Linux based MTA's
> has
> no problems.
>
> any suggestions?
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| Hm, it seems I haven't been specific enough.
This is not a Postfix problem. Postfix is just the ISP mail relay. When I'm
sending directly from Exchange 2003 (usnig local DNS to route mail) I get the
same error, but when sending from Win2000/Exchange 2000 no problem. This
problem occurred after upgrading to Win2003/Exchange 2003. This indicates
that it is an Exchange problem.
/Arne
"Peter Karsai" wrote:
> Hello,
>
> Postfix can do "sender callout verifications", which means that if someone
> tries to send email in the name of john@example.org to a Postfix server, it
> connects back to the MX of example.org and initiates mail sending to
> john@example.org. If it fails, Postfix assumes that the sender was invalid.
>
> Most likely the problem is that the sender is in format john@LOCALDOMAIN,
> from which the "LOCALDOMAIN" zone cannot be resolved by the Postfix MTA.
>
> Peter
>
> "MrDk" <MrDk@discussions.microsoft.com> wrote in message
> news:E42ED105-F023-44AA-84AE-B4C7957F1946@microsoft.com...
>
>
>
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