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C.9 Upgrading from 7.0 to 8.0

Version 8.0 is a major rewrite, that introduces a lot of new concepts and features. Nevertheless, it is still able to run the MFL scripts from version 7.0 without modifications.

Note the following important points:

• The listen configuration statement withdrawn

  Use the server milter statement instead. See Server Configuration.

• The --remove option withdrawn

  This option was a noop since version 7.0.91.

• The use of ‘%’ before variable names is no longer supported

  The ‘%’ characters is used as modulo operator. See Arithmetic Operations.

• The debug_spec built-in function changed signature.

  See debug_spec.

• listens and portprobe

  The listens function was moved to the portprobe module. It is actually an alias to the portprobe function. If your filter uses listens, make sure to require the portprobe module.

  See portprobe.

• _pollhost, _pollmx, stdpoll, strictpoll

  These functions have been moved to the poll module, which must be required prior to using any of them.

• The message_header_count function.

  This function takes an optional string argument, supplying the header name. See message_header_count.