Written by Martin Wendel, ITS, Uppsala university. Martin.Wendel@its.uu.se


Emil uses a configuration file for multiple purposes. One purpose is to retreive the conversion profile for the specified message addresses. Another purpose is to retreive information about file type marking among other things.

The configuration file consists of four parts or functions:

  1. group - Specifies a conversion profile.
  2. mailer - Defines a mailer (program) with arguments.
  3. match - Specifies file type information.
  4. member - Binds addresses to a conversion profile.


The group command is used to define a conversion profile, a named method for conversion. The conversion profile contains a specification of what format, charset and encodings to be used and when Emil has selected a conversion profile, the information within that will be used when undertaking conversion.

The syntax of the group command is the group keyword followed by a name, a colon and a comma separeted list of options, as follows:

group Group_name : [charset=CHARSET] [format=FORMAT] [bin=ENCODING] [textenc=ENCODING] [henc=ENCODING] ;


The mailer command is used to define a mailer, or program, to be used as an execv vector that will be forked off and will receive the output of the conversion. The mailer name is referred when using the "-m" command line flag and will thus result in the execv specified by the mailer definition will be executed in a child and the output of the conversion will be sent to the stdin of the child.

The syntax of the mailer command is as follows:

mailer Mailer_name : PATH, PROGRAM, ARGUMENTS, ... ;


The match command is used to define file type information such as X-Sun-Data-Type of Sun Mailtool messages, Content-Type of MIME messages, file name extensions for UUencoded files and Type&Creator for Applefiles. What kind of type information is specified by the CONTEXT

The syntax of the match command is as follows:

match CONTEXT Match_String OUT ;


The member command is used to bind the address information, given as command line arguments to Emil, to a conversion profile. Address information is given as the triple of Recipient, Sender, and Recipient_host. Several triples may be bound to one conversion profile, in wich case the triples are specified as a comma separated list.

The syntax of the member command is as follows:

member Group_name : Recipient Sender Recipient_host, ... ;

March 1996

ITS Uppsala university
Box 887
751 08 Uppsala

Martin Wendel E-Mail: