Beginning with V8.10
sendmail, the
MaxMimeHeaderLength option (MaxMimeHeaderLength) can be used to define the maximum length for
the parameters that some MIME headers take. A parameter is separated
from the main header name and value by a semicolon:
name: value ; parameter ; parameter ...
Before checking that parameter's length,
sendmail looks to see if the header
name is in the class
$={checkMIMEFieldHeaders}. If it
isn't, sendmail skips the
parameter length check.
When V8.10 sendmail starts up, it predefines the
$={checkMIMEFieldHeaders} class to contain two
MIME headers: the Content-Disposition: header
(Content-Disposition:); and the
Content-Type: header (Content-Type:). You can add more headers with the
C or F configuration file
commands.
If any of these parameters are found to be too long, they are
truncated to the limit imposed by the
MaxMimeHeaderLength option (MaxMimeHeaderLength).
