How do I set up and verify Reverse DNS Lookup?
To ensure remote mail servers reliably accept SMTP connections from the Sendio ESP, first determine the public IP address associated with it and then ensure a corresponding PTR record is set up for this address. To determine the public IP address, access the Console (SSH) Interface > Network Diagnostics > SMTP Diagnostics Test. This server will respond […]
Is reverse DNS (rDNS) important?
Yes. Many mail servers will not properly accept or process email coming from IP addresses that fail a reverse DNS lookup. Please review this FAQ for instructions on setting up a reverse DNS entry – How do I set up and verify Reverse DNS Lookup?
Why are SAV Requests and other outbound e-mail being deferred or rejected?
Many mail servers perform a Reverse DNS lookup on the originating IP address of an incoming SMTP connection. If the result of such lookup fails or the result does not translate back to a proper hostname (one associated with your domain), the SMTP connection will either be rejected, the mail will be deferred, or it […]
How do I login/access the Console Interface?
Access to the Console interface can be done using a keyboard and monitor connected to the unit, or using an SSH Client such as “Putty” to access the unit via IP address using port TCP 22. The login username is always 'sysconfig'. When a new unit ships, the default password is 'admin'. This password is […]
How do I verify that my standby unit is fully functional?
Please contact Sendio Support. If we have SSH access there are checks we can perform to confirm the two cluster nodes are synchronizing.
If the active unit fails, will there be an automatic failover to the stand-by unit?
No. You must shut down and power off the active server, then follow the instructions below on the secondary node: Version Mar08SU 1209 and later: Navigate to Console Interface > Cluster Configuration. Select Make Server Primary. Confirm Cluster IP Address has transferred to new primary node. Change the IP address under Network Configuration to match the IP of the […]
How do I set up a cluster?
Version Mar08SU 1209 and later: Connect a crossover Ethernet cable between the two units, using their respective RED Ethernet ports on the back. Ensure that both units have the same software version by examining the information in the Console Interface > System Configuration section. If necessary, use Sendio Update to update the software on one or […]
Can both units of a cluster be active at the same time? Can they do load-balancing?
Version Mar08SU 1209 and later: Service portability, the ability to have certain services running on both nodes, is possible. While not true load balancing this does allow both nodes the ability to process messages. Please contact Sendio Support for more information. Versions earlier than Mar08SU 1209: Load balancing and service portability are not possible.
How often is data replicated between the clustered units?
The active unit replicates data to the passive unit continuously. In a properly operating cluster, data on the the standby node of a cluster is kept synchronized at all times to within 5 minutes of the Active Node.
Can the Sendio ESP “Push” a backup to a location on my Network?
Version Mar08SU 1209 and later: Backups can be pushed to a Windows/Samba share or USB drive. Navigate to Console Interface > Backup/Maintenance and arrow down to the very bottom of the right side of interface – you will find the Backup/Restore Location. Versions earlier than Mar08SU 1209: Backups can only be pulled via FTP. Please refer to […]