| Caution |
Filter described here is filter system for articles posted to ML. This filter is implemented as FML::Filter class. Other than article filter, there may be command mail filter. FML::Filter does not provide such function. Instead, FML::Command::Filter class provides command mail specific filter e.g. line length limit of one line. |
There are three types of filter system for content check such as for header, body and mime structure based. Other than the tree cases, we should consider text/plain and non mime text (text/?) filter. So there may be four types of filter.
header body non-mime permit / reject (!MIME of 4.0's content filter) mime component filter 4.0's content filter text/plain filter ja, en, ... (language dependent) language independent (e.g. M$ GUID scanner) check of the first text/plain part syntax check external filter (call external virus/spam checker) clamav spamassassin bogofilterOther than these filters, content_filter using SMTP/LMTP can be needed but not implemented. If you need content_filter, please use the function of Postfix.
Traffic based filter is also needed but not implemented yet.
Copyright (C) 1993-2022 Ken'ichi Fukamachi mail:< fukachan at fml.org >