Save the message to a file. And test like this:
% postmap -q - pcre:/etc/postfix/body_checks.pcre <messagefile
So does this.
cat << EOF > /tmp/testfile
TEST BAD CONTENT
EOF
postmap -q - pcre:/etc/postfix/body_checks.pcre </tmp/testfile
TEST BAD CONTENT REJECT 554 5.7.1 Message not allowed
But the message sent from gmail still gets through.
I get this feeling I'm missing something really simple here :-/
You could use the message file from your imap server or look at the raw
message in your mail program and save that to a file...
Thanks,
Billy
Christian