The language is determined by the MIME encoding of the message. The system
does not scan the content of the message lexically but rather depends
exclusively on the MIME headers to determine the language of origin.
Therefore, some messages containing blocked character sets could still slip
through undetected from time to time if the MIME encoding specifies an allowed
Messages in languages that are marked as No Opinion
(the default) are handled normally while Allowed languages
are always accepted regardless of their spam score (unless they contain a
virus). Blocked messages are deleted.
It is not possible to take any special action on the English language and its
options are greyed out.