Using the Forwarding tab parameters you can forward messages to another SMTP server automatically. Forwarding can be used especially for:
splitting the domain into more servers (for more information, see chapter 27.4 A company with multiple sites),
creating a backup mailserver (for more information, see chapter 27.5 Setting up the backup mail server).
- If the recipient was not found...
Messages will be forwarded to another SMTP server if a recipient is not found in the domain. Messages are forwarded only if the recipient's address is not an address of any user, group or alias included in this domain. If there is no user, group or alias defined in this domain, all messages will be forwarded (this function is equal to the Forward feature in versions former to Kerio MailServer 5.5).
- Forward to server
DNS name or IP address of SMTP server to which all email messages for this domain will be forwarded.
- Port
SMTP server port. The button sets the standard
25port.- Online delivery — deliver the messages immediately
This option is helpful when it is intended to divide a domain to multiple servers while a persistent Internet connection is provided (for details, see chapter 27.4 A company with multiple sites).
Online delivery follows SMTP delivery settings (). For details on this tab, see chapter 15.2 SMTP server.
- Offline delivery — delivery is started by scheduler
Under normal circumstances, Kerio MailServer sends email for the Forward domain to the specified SMTP server immediately. If the server has a dial-up connection to the Internet, then this may cause very often dialing and hanging up of the line (and high costs for the connection). Enabling this option will allow email for the Forward domains to be queued and delivered at scheduled times only (see chapter 9 Scheduling).
- Offline delivery — delivery is triggered by ETRN command from remote host
Kerio MailServer keeps all messages addressed to this domain up to the moment when the ETRN command with this domain included as a parameter (for details, see chapter 15.1 Mail Delivery over the Internet) is received before sending them to the defined SMTP server. This way Kerio MailServer can be used as a secondary server for a domain whose primary SMTP server is not permanently connected to the Internet.
- If the domain...
Here you can define whether messages that contain one of domain's aliases in the recipient's address will be forwarded or not. The Don't forward such messages option disables loops in case that the particular recipient cannot be found at any server operating with this domain.
Note: If the domain is covered by two servers, set this option on one of them only (for detailed description of a domain covered by two and more servers, see chapter 27.4 A company with multiple sites).