After stopping the browser service on a 2-node SQL Server failover cluster system, the Database Mail component stopped working. It fails and creates log entries as follows:
Message: There was an error on the connection.
Reason: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible.
Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified), connection parameters:
Server Name: SQLCLNETWORK1\INSTANCE1,
Database Name: msdb
The instance behind "SqlClNetwork01" is running on non default Port. The SQL Server engine itself continued without any problems.
So my question is, why does the Mail Service have issues with the browser service stopped? Where is it trying to connect to the SQL Server engine without success?