apparently, our users are receiving emails containing links and /or
references to various publications, some of which are considered
'predatory'. Emails usually contain ISSN (International Standard
Serial Number) and the idea is to scan the body of an email for the
ISSN and if it matches one on the 'blacklist', the subject of the
email should be prepended with some specific warning (other than
***SPAM***).
We're already using Amavisd-new on our inbound SMTP server, so I
wonder if that would be possible with it?
This would have been a use-case for [1]. The corresponding Amavis
feature is still unreleased, unfortunately.
[1]
https://spamassassin.apache.org/full/3.4.x/doc/Mail_SpamAssassin_Conf.html#subjprefix
