Hi,
vielleicht hilft das ja (Warum stellst Du das ins R4 Forum?)
Domino R5 Server Fails Message Transfer with "SMTP Protocol Returned a Transient Error"
Problem:
A Domino 5.x SMTP server fails to send successfully outbound SMTP messages to recipients at SAMPLEDOMAIN.COM. Instead, the following errors are recorded in the sending SMTP server's Log file (LOG.NSF):
"05:12:32 PM Router: No messages transferred to sampledomain.com (host sampledomain.com) via SMTP: SMTP Protocol Returned a Transient Error
05:12:32 PM Router: Failed to connect to SMTP host sampledomain.com because SMTP Protocol Returned a Transient Error."
How can this issue be investigated?
Solution:
To investigate outbound SMTP protocol activities for a Domino 5.x SMTP server, do the following:
Add the parameter SMTPCLIENTDEBUG=1 to the sending Domino SMTP server's NOTES.INI.
Set the "Logging level" field (in the Configuration document's Router/SMTP, Advanced, and Controls tabs, and "Miscellaneous Controls" section) to "Verbose."
Restart the Domino SMTP server.
Note the additional SMTP output in the Mail Routing view of the Domino SMTP server's LOG.NSF.
Supporting Information:
In this case, one problem was a misconfiguration in the Domain Name System (DNS) for SAMPLEDOMAIN.COM. Usually, in LOG.NSF entries about the transfer of SMTP messages to an Internet domain, the host name of the destination server follows the word "host" and precedes the name of the destination Internet domain suffix. For example, if the host name of the destination server in the above example were "SERVER1", the entry in LOG.NSF would refer to "...(host server1.sampledomain.com)..." instead of "...(host sampledomain.com)..." Note that a "space" character separates the word "host" from the host name; and a period (.) separates the host name from its domain suffix.
