checkMIMETextHeaders

$={checkMIMETextHeaders}

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MIME headers for maximum arbitrary length checking

V8.10 and above

Beginning with V8.10 sendmail , the MaxMimeHeaderLength option (MaxMimeHeaderLength) can be used to define the maximum length for selected MIME headers that present text descriptions. Before making that check, sendmail looks to see if a particular header is in the class $={checkMIMETextHeaders} . If it isn't, sendmail skips this length check.

When V8.10 sendmail starts up, it predefines the $={checkMIMETextHeaders} class to contain the single MIME header Content-Description : header (Content-Description:). You can add more headers with the C or F configuration file commands.

If this header's value is found to be too long, it is truncated to the length specified by the MaxMimeHeaderLength option. Note that this is a blatant truncation , and no effort is made to keep the header legal because it contains only random text.

Note also that you should use $={checkMIMEHeaders} ($={checkMIMEHeaders}) for RFC-format specific headers.