Unoverica Message Transport v2.11 Appendix F: Options, Macros, Classes, Headers, Mailers and Rules

Appendix F: Options, Macros, Classes, Headers, Mailers and Rules

F.5 Defining Headers

Every mail message contains standard fields, called "headers." The headers consist of "To:", "From:", "Subject:" and other pieces of information relevant to the current message being processed. When a message comes in, Unoverica Message Transport reads the headers of the message into memory, and then rewrites them when the message is sent out for delivery. During the re-write phase, Unoverica Message Transport will add some of it’s own information to the headers, and will keep the rest of them as they were originally presented.

The formatting and presentation of the headers are presented is managed through Unoverica Message Transport’s UCMCON.NLM management tool. UCMCON.NLM is a NetWare Loadable Module that runs on the NetWare server. To load UCMCON, type the following command at the NetWare console prompt:

:LOAD UCMCON <Enter>

You will be presented with a screen similar to the following:

Figure F.17: UCMCON's main menu.

Select the "Configuration" menu item and press <Enter>. You will then be presented with a set of configuration menu choices similar to the following:

Figure F.18: UCMCON's Configuration menu.

Select the "Headers" menu option and press <Enter>. You will then be presented with a list of the currently defined headers, similar to the following:

Figure F.19: UCMCON's currently-defined headers.

Use the <Up>, <Dn>, <PgUp> and <PgDn> keys to scroll through the list of currently-defined classes. Unlike the options, macros and classes, you may not add or delete any header definitions.

Header values can have a variety of different data types, depending on the function they serve. They can accept ASCII strings (useful for entering file and directory names), numbers, mixed strings of text and numbers, or they can contain references to classes or macros within their definitions. The data you enter will be determined by the header being defined.

WARNING: Making changes to the Unoverica Message Transport system may cause the mail system to function improperly, resulting in lost or corrupted mail messages. Unoverica Corporation will not be liable for any problems resulting from the unauthorized use of these advanced configuration options.