Symantec 10490452 Administration Guide - Page 26
Table 2-3, Description, Settings also exist governing SMTP delivery configuration for your site.
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26 Configuring system settings Configuring host (Scanner) settings Table 2-2 Outbound SMTP advanced setting descriptions Item Description Maximum message Sets the maximum size allowable for a message before it is size in bytes rejected. The default is 10,485,760 bytes. Maximum number of recipients per message Indicates the maximum number of recipients permitted to receive this message. The default is 1,024 recipients. Default domain for sender addresses with no domain Sets a default domain when none can be found in the message. Insert RECEIVED header Places a RECEIVED header in the message during outbound SMTP processing when checked. When unchecked, no RECEIVED header is inserted during outbound SMTP processing. If Insert RECEIVED header and Strip RECEIVED headers are both checked, the outbound SMTP RECEIVED header remains when the message goes to the delivery queue. Strip pre-existing RECEIVED headers from outbound messages Removes all RECEIVED headers for the message when checked. When headers are stripped, message looping can occur depending on the settings of other MTAs. When unchecked, RECEIVED headers remain in the message during outbound processing. The RECEIVED header for outbound SMTP processing remains in the message when Insert a RECEIVED header and Strip pre-existing RECEIVED headers from outbound messages are checked. Enable reverse DNS lookup Causes the system to perform reverse DNS lookup on the SMTP client IP addresses to resolve the IP address to a name. when checked. This is the default condition. When unchecked, reverse DNS lookup is not allowed for outbound messages. Settings also exist governing SMTP delivery configuration for your site. Delivery configuration message settings are as follows: Table 2-3 SMTP delivery advanced setting descriptions Item Description Maximum number of external connections Maximum number of external connections to a single IP address Sets the maximum number of simultaneously allowed external connections. Additional attempted connections are rejected. The default is 100 connections. Sets the maximum number of simultaneous connections allowed to a single IP address. Additional connections to this IP address are rejected. The default is 50 connections. You can also limit the number of connections to a single IP address per time period.