smfi_addheader(3N)														smfi_addheader(3N)

NAME

       smfi_addheader() - adds a header to the current sendmail message

SYNOPSIS

PARAMETERS

       includes the following arguments:

       ctx	 Specifies the opaque context structure.

       headerf	 Specifies the header name, which is a non-NULL, null- terminated string.

       headerv	 Specifies the header value to be added.  headerv is a non-NULL, null-terminated string and can be an empty string.

DESCRIPTION

       adds a header to the current message.  can be called only from the function.

   Notes
       does not change existing headers of a message.  To change the current value of a header, use the routine.

       A filter that calls the must set the flag in the structure passed to the

       For  the filter, the order in which filters are placed is important.  Filters placed later in the sequence will observe the changes already
       done by the earlier filters.

       The name and the value of the header are not checked for standards compliance.  However, each line of the header must be under 2048 charac-
       ters.  If longer headers are needed, multi-line header must be used.  To make a multi-line header, insert a line feed (ASCII 0x0a, or 
 in
       C) followed by at least one whitespace character, such as, a space (ASCII 0x20) or tab (ASCII 0x09, or 	 in C).  The line feed must not be
       preceded  by a carriage return (ASCII 0x0d); the MTA adds this automatically.  It is the responsibility of the filter writer to ensure that
       standards are not violated.

RETURN VALUE

       returns due to the following reasons:

       o  The headerf or headerv is
       o  Adding headers in the current connection state is invalid.
       o  Memory allocation failure.
       o  Network error
       o  is not set when the routine is called.

       returns on success.

EXAMPLES

       Following is an example to add a header:

AUTHOR

       was developed by the Sendmail Inc.

SEE ALSO

       smfi_chgheader(3N), smfi_insheader(3N), smfi_addrcpt(3N), smfi_delrcpt(3N), smfi_replacebody(3N).

       on

																smfi_addheader(3N)