Restarting SMTP Service on a Domino Server

Stopping and starting a Domino Server’s SMTP service

Domino Server Settings

After updating mail routing settings on a Domino Server, typically the SMTP service needs to be restarted. The best way to do this operation is from the Domino Server Console.

Domino Server SMTP start

From the Admin UI:

  1. Click the Server – Status tab and select the Server Tasks view.
  2. Click Tools – Task – Start
  3. From the list of server tasks, select SMTP Server.
  4. Click Start Task.
  5. Click Done to close the Start New Task dialog box.

From the server console:
Load SMTP

Look for diagnostic messages on the console. Allow several minutes on a busy server.

Domino Server SMTP stop

From the Admin UI:

  1. Click the Server – Status tab and select the Server Tasks view.
  2. Select SMTP Server from the list of tasks.
  3. Click Tools – Task – Stop, and then click Yes.

From the server console:
Tell SMTP quit

Look for diagnostic messages on the console. Allow several minutes on a busy server.

Domino Server SMTP restart

From the Admin UI:

  1. Click the Server – Status tab and select the Server Tasks view.
  2. Select SMTP Server from the list of tasks.
  3. Click Tools – Task – Restart, and then click Yes.

From the server console:
Restart Task SMTP

Look for diagnostic messages on the console. Allow several minutes on a busy server.

For more articles from the NewPush Managed Domino Server Team see Domino Server Support and Collaboration Services.


Lotus Domino DNS Timeout Issue

Domino Server causes intermittent email bouncing

On a Domino Server to 8.5FP1

After upgrading a Domino Server to 8.5FP1 we noticed intermittent email bouncing even though the emails were correctly delivered to the email server. The server response was:
451 Unable to complete command, DNS not available or timed out

This message is misleading. What it really means that Domino wasn’t able to verify the sender domain’s RDNS (reverse DNS) entry.
IBM Domino Server and Collaboration Suite

Disabling Reverse DNS Check

If your Domino infrastructure already has a security mail gateway, then this extra protection on the Domino server isn’t needed and disabling it will speed up the SMTP operations of the Domino Server. Here are steps on how to turd this feature off.

Steps to turn off rDNS checking on the Domino Server

  1. Make sure you already have a Configuration Settings document for the server(s) to be configured.
  2. From the Domino Administrator, click the Configuration tab and expand the Messaging section.
    Click Configurations.
  3. Select the Configuration Settings document for the mail server or servers you want to restrict mail on, and click Edit Configuration.
  4. Click the Router/SMTP – Restrictions and Controls – SMTP Inbound Controls tab.
  5. Set the field “Verify sender’s domain in DNS” in the Inbound Sender Controls section do “Disabled,” and then click Save & Close

More information on Domino Server SPAM prevention

For more articles from the NewPush Managed Domino Server Team see Domino Server Support and Collaboration Services.


Lotus Protector for Mail Security

Enterprise Class Email Protection

If you need to go beyond classic SPAM and Virus filtering for your IBM Domino environment, we recommend you take a look at Lotus Protector for Mail Security. Starting at only $29.50 one time license fee per user, it is easy to see how the ROI over 1 year beats most commercially available solutions, and the ROI the 2nd year can mean as much as 75% savings over comparable solutions. A 90 day trial is available to test drive the product.


How to clear the IBM Lotus Domino server's dns cache

Problem

When the domino server caches an MX record, and that record changes, it may take time before the cache is refreshed. In some instances it is desirable to have the DNS cache refreshed on demand.

Solution

On the Domino console (IBM Domino Administrator -> Server… -> Status -> Server Console) run the following domino command:
tell router update config
If you need the cache to be refreshed more often, you can set this command to run on a schedule as well.


IBM Domino SSL Keyring File access error when using SMTP TLS

Problem

When using SMTP TLS, the IBM Domino server shows the following error in the log file:
SSL Error: Keyring File access error

Solution

When engaging the STARTTLS command, the Domino server looks in the default location for the Keyring file with the default name: keyfile.kyr and keyfile.sth. The location is the data root specified for the Domino server.

References

Notes/Domino 6 and 7 Forum


LDAP Authentication with IBM Domino Server 8.5.1

Problem

When using a complex email infrastructure, multiple email servers are involved usually. The core servers typically take care of managing the data that users access in their day to day activities. Other servers can be used for SPAM/Virus filtering, archival, store and forward functions. It is important for all these servers to be able to synchronize the list of valid users. The IBM Domino Server is perfect for this. For each organization, email administrators can configure a virtual LDAP server that handles the needs for authentication and user list synchronization.

Solution

In order to authenticate the the LDAP server on IBM Domino, the following steps are needed:

  • In the server configuration, under Web / Internet Sites, configure an LDAP server for your organisation
  • In the LDAP client that you want to connect from, specify the admin user for the connection as follows:
    CN=User Name of Administrator/O=Organization Name
  • To retrieve the valid email users, you can use this query:
    Srtring: (|(mail=*@%s)(proxyAddresses=smtp:*@%s))
    Attributes: mail, proxyAddresses