Welcome to this comprehensive tutorial on troubleshooting mail server issues on Dell Data Domain. In this video, we will guide you through the essential steps to configure and test your mail server, test autosupport, and ensure proper network configurations. Whether you're a beginner or an experienced IT professional, this video will help you resolve common mail server problems efficiently.
Welcome to this tutorial on troubleshooting mail server issues on Dell Data Domain. Let's get started! First, let's check if a mail server is configured on your Data Domain. Use the command 'config show mailserver'. If no mail server is configured, you need to set up one: In DD OS 7.0 and newer, we support the SMTP encryption method STARTTLS.
If your mail server uses STARTTLS, configure it with the appropriate port and username. Use either port 25 or 587. Check with your Email Administrator if a password is required. If not, simply press enter. To check your admin email use 'config show admin-email' Now, to configure the mail server use 'config set mailserver' followed by the host for example '10.60.36.150' then 'port 25' if a user is needed add 'user' followed by the username and Enter the password when prompted.
To test autosupport, use the following commands. Run 'autosupport test email' followed by your email address or 'autosupport test alert-summary' NOTE: If ESRS/SRS or SCG has been configured, then "autosupport test" does not generate an Email until later than DD OS 8.0. You have to use "autosupport send" instead. To avoid having to wait for a full report, you can use the following syntax: 'autosupport send <yourEmailAddress@company.com> cmd net show settings Next, check if you can ping the mail server hostname or IP address. 'net ping' followed by the mail server IP then 'count' and the number of pings you want to send.
If ping fails, try another interface. Use 'net show set' for a list of available interfaces then use 'net ping' followed by the mail server hostname or IP 'interface' followed by the interface name, for example 'ethMa' To display gateways available use: 'net route show gateway' If you prefer to use a specific interface for the mail server, set up a static route using the command 'net route add host' followed by the IP or hostname of mail server then 'gw' followed by the IP of your local gateway and 'dev' followed by the interface name. Now let us check if DNS is configured and test name resolution. Type in 'net show dns' to see the DNS configuration. Use 'net lookup' followed by for example the mail server to test the DNS. If needed, you can set a DNS by using 'net set dns' followed by the IP address of the DNS.
To add the hostname and IP of the mail server to the Data Domain's hosts file for local resolving, use 'net hosts add' then the IP address and the hostname. Ensure the required ports for SMTP are open. Typically, port 25 and sometimes port 587 are used. Run the command 'net port-check' followed by the mail server address and the port. Keep in mind that 'net port-check' is a replacement for the discontinued Telnet command and is only available on newer DDOS versions. Check if the Data Domain IP addresses on the allow list of the mail server.
This is crucial for allowing traffic. You can list the Data Domain IP addresses using these are on the allow list of your mail server. Ensure an NAT rule has been added for outgoing traffic for the Data Domain SMTP mail server. If using a firewall like Palo Alto, a policy must be added to allow outbound communication. An error message indicating firewall blockage might be: "Unable to send a message: (errno 10: SMTP operation timed out)". Sometimes an admin host is required. Check if an admin-host is configured using 'config show admin-host' To set the admin host type 'config set admin-host' followed by the hostname.
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