Event ID - 6856

Event Id6856
SourceWindows SharePoint Services 3
DescriptionCannot resolve name of SMTP host %1.
Event InformationAccording to Microsoft :
Diagnose :
Windows SharePoint Services 3.0 could not send an SMTP e-mail message. This error might be caused by one of the following conditions:
1)The SMTP host is not running
2)The SMTP service is not running on the SMTP server
3)The SMPT host is not correctly configured in Central Administration
To perform this procedure, you must be a member of the Administrators group on the local computer:
To confirm that the SMTP server is running and configured correctly
1.In Internet Information Services Manager, connect to the SMTP server.
2.Expand the server node and look for the SMTP virtual server. There might be more than one virtual server.
3.The service should be running.
4.To check the configuration, open the service's properties.
5.On the Delivery tab, clickOutbound Security.
6.In theOutbound Security dialog box, either theAnonymous access or Integrated Windows Authentication option must be selected. If the Integrated Windows Authentication check box is selected, ensure that the Windows SharePoint Services Central Administration application pool account has access by checking the Account and Password boxes.
To perform this procedure, you must be a member of the Administrators group on the local computer:
To confirm that the SMTP service on the local computer is running
1.In the Services MMC snap-in, look for the Simple Mail Transfer Protocol (SMTP) service.
2.The service should be started.
You must be a member of the SharePoint Administrators group to perform this task:
To confirm the SMTP host settings in Central Administration
1.In Central Administration, on the left-side navigation pane, click Operations.
2.On the Operations page, in theTopology and Services section, clickOutgoing e-mail settings.
3.The SMTP server should appear in the Outgoing SMTP server box on the Outgoing E-Mail Settings page, underMail Settings.
Resolution :
To resolve this issue, use the resolution that corresponds to the cause you identified in the Diagnose section.
Start and configure the SMTP service
You must be a member of the Administrators group to perform this action.
To start and configure the SMTP virtual server
1.In Internet Information Services Manager, connect to the SMTP server.
2.Expand the server node and look for the SMTP virtual server used by Windows SharePoint Services 3.0.
3.Right-click the correct virtual server and clickStart.
4.To configure the virtual server, open the virtual server's properties.
5.On theDeliverytab, clickOutbound Security.
6.In theOutbound Security dialog box, either the Anonymous access or Integrated Windows Authentication option must be selected. If the Integrated Windows Authentication check box is selected, ensure that the Windows SharePoint Services Central Administration application pool account has access by checking the Account and Password boxes.
Configure outbound e-mail settings in Central Administration
You must be a member of the SharePoint Administrators group to perform this task.
To configure outgoing e-mail settings in Central Administration
1.In Central Administration, on the left-side navigation pane, click Operations.
2.On the Operations page, in theTopology and Services section, clickOutgoing e-mail settings.
3.On the Outgoing E-Mail Settings page, underMail Settings, type the correct SMTP server in theOutgoing SMTP server box.
Verify :
Create a new instant alert and ensure that an e-mail message is sent properly.
To create an immediate alert e-mail message
1.Navigate to a site that has a list of any type.
2.Open an item on the list.
3.Click Alert Me.
4.On the New Alert page, in theSend Alerts To section, type your account name in theUsers box.
6.After verifying other settings, click OK.
Reference LinksEvent ID 6856 from Source Windows SharePoint Services 3

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