Upgrading A Domino 4.5X Or 4.6X Smtp Mta Server To Release 5.X Of Domino

When configuring a SMTP MTA server in a 4.5x. or 4.6x environment, it was
possible to specify that Internet addresses bases upon the Domain Part of the
Address route to different next hops via a single Domino SMTP MTA Server. This
was done by creating multiple Foreign SMTP Domain Documents with matching SMTP
Connection Documents. ?In R5, this has changed with the use of the R5
configuration document.
When configuring a SMTP MTA server in a 4.5x. or 4.6x environment, it was
possible to specify that Internet addresses bases upon the Domain Part of the
Address route to different next hops via a single Domino SMTP MTA Server.

Address Example: <local part>John.Smith@Lotus.Com<domain part>


This was done by creating multiple Foreign SMTP Domain Documents with matching
SMTP Connection Documents. ?In R5, this has changed with the use of the R5
configuration document.

For?example, in R4.x: you would configure a Foreign SMTP Domain Document with
the following and a SMTP Connection Document with the following values to route
Internet based mail from Notes to the Domino SMTP MTA where the Notes CD format
would be converted to MIME and then send over SMTP to either the destination
SMTP Server, or another SMTP server that would then forward then message.

Example Configuration:

Field: Messages Addressed to: *.*
Field: Should be routed to: Domain name: SMTPMAIL




This would have a corresponding SMTP Connection Document:



The key field that links these two document is The Destination Domain:
SMTPMail in the SMTP Connection Document.

The Destination Domain field in the SMTP Connection Document should be
routed to the Domain Field in the SMTP Foreign Domain Document to create a
virtual Domain.


Note: In the SMTP Connection Document the Source Server is the Domino
Server that the SMTPMTA Task is running on.


Therefore, all messages addressed to the <localpart>@<domain> part i.e. *.*
will route from the Users Home Domino Mail Server ultimately going the Domino
SMTP MTA Server in the Source Server Field in the SMTP Connection Document.

Note: This is a basic example. In a complex Domino Mail infrastructure with
multiple SMTP MTA Servers there are several other factors that must be
understood in order to route Mail to a specific Domino SMTP MTA Server. Such
as, How many Notes Domains, How many Notes Named Networks. Also a thorough
understand of how the Notes Router works, i.e. with use of Cost, Hopes and
Server name in deterring the route mail will travel within the Domain
Environment.


The Internet destined messages untimely arrive in Mail.Box on the Domino
Server, where the local router then moves the messages to SMTP.Box. The
messages are then converted from Notes CD Format and placed into the SMTP
Outbound Work Queue (smtpobwq.nsf)

The next hop for these messages is directly dependent on whether the Relay Host
Field of the SMTP Connection document is populated. If the entry in that field
is blank, then the SMTPMTA Outbound Session Handler will attempt to resolve the
Domain Part of the RCPT To:, example: Rcpt to:John_Smith@Lotus.Com. ?The Domain
Part @Lotus.Com would then need to be
resolved to an IP Address. This could be done via a host table, or the DNS
and MX's records. The SMTP outbound Session Handler after resolving the Domain
Part of the Destination Address would then attempt to establish a connection to
port 25 of the destination Sever.


If the Relay Host field is populated with an entry, e.g. relay1.lotus.com,the
SMTPMTA Outbound Session Handler would then only try to resolve the next hop as
relay1.lotus.com and open a session with the resolved address for
relay1.lotus.com. In this senecio the next hop , relay1.lotus.com would then
have the responsibility for resolving the domain part of the address to the
next hop.


Another option prior to Domino R5 allowed you to specify an SMTP Foreign
Domain Document with the following configuration: with more explicit routing
instructions with a corresponding SMTP Connection Document, yet still route out
through the same Domino SMTP Server as described above.

Example Configuration:
SMTP Foreign Domain Document.
Field: Messages Addressed to: *.myintranet
Field: Should be routed to: Domain name: InsideMail

This Foreign SMTP Domino Document would have a corresponding SMTP
Connection Document with an entry in the Destination Domain Field of :
InsideMail





Note: The Entry in t
This was first published in November 2000

Dig deeper on Domino Resources - Part 8

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