Outbound SMTP port settings affect how IBM® Domino® connects
to other SMTP servers. Change the default port numbers and the status
of the TCP/IP and SSL ports to match the settings on servers to which
this server sends SMTP mail.
About this task
The outbound port settings apply to all outbound SMTP
sessions. If you change an outbound port number to a nonstandard value,
the server cannot establish SMTP connections with servers that listen
for SMTP requests on the standard port. Similarly, if you set up the
server to send SMTP over SSL only, disabling the outbound SMTP TCP/IP
port, the server cannot establish SMTP connections with a remote server
that accepts SMTP connections over the TCP/IP port only.
Procedure
- From the Domino Administrator,
click the Configuration tab and then open the
Server document for the server that runs the SMTP service.
- Click the tab.
- In the Mail (SMTP Outbound) column,
complete these fields, and then click Save & Close:
Table 1. SMTP Outbound options
Field |
Enter |
TCP/IP port number |
The number of the TCP/IP port on the remote
server to which Domino attempts
to connect when initiating an SMTP session. The default and industry
standard port for SMTP connections over TCP/IP is 25. Specify a nonstandard
port only if this Domino server
makes all of its outbound SMTP connections over TCP/IP to a server
that uses the nonstandard port. |
TCP/IP port status |
Choose one:
- Enabled - The Domino SMTP
Router connects to the designated TCP/IP port number on a remote server
to initiate an SMTP session. If the SSL port status is also set to
Enabled, the Router attempts to use the SSL port first and uses the
TCP/IP port only if it cannot connect to the SSL port.
- Disabled (default) - The Domino SMTP
Router cannot initiate an SMTP session using the TCP/IP port on a
remote server.
- Negotiated SSL - The Domino SMTP
Router connects to the designated TCP/IP port on a remote server to
initiate an SMTP session. If the remote server advertises STARTTLS during
the EHLO greeting, Domino issues
a STARTTLS command to request that the remainder
of the session be encrypted using SSL. If the remote server does not
support STARTTLS, an unencrypted TCP/IP session
ensues.
|
SSL port number |
The number of the SSL port on the remote server
to which Domino attempts
to connect when initiating an SMTP session. The default and industry
standard port for SMTP connections over SSL is 465. Specify a nonstandard
port only if this Domino server
makes all of its outbound SMTP connections over SSL to a server that
uses the nonstandard port. |
SSL port status |
Choose one:
- Enabled - The Domino SMTP
Router connects to the designated SSL port number on a remote server
to initiate an SMTP session. If the Router cannot connect to the SSL
port and the TCP/IP port is also enabled on both the Domino server and the remote server, Domino makes a second attempt
to connect, using the designated TCP/IP port.
- Disabled (default) - The Domino SMTP
Router cannot initiate SMTP sessions over the SSL port of a remote
server.
|