Mandrax does seem to be behaving rather badly. I don't know postfix and
sympa well enough, but I strongly suspect that one of them is doing some
re-writing on the outbound mails.
I had a post this morning that didn't show back up in my inbox for 2-3
hours, and a couple of others got intercepted by Dave Null.
I got an email from Rusty Carruth a while after my post had come back to
me, and we conversed for a little while, and then about 2 hours later, I
saw a post from him on the list regarding this problem.
The "append" and "footer-type" sound suspiciously like configuration
directives, but I wouldn't be able to guess which program they belong
to.
Maybe Vince Danen knows something about this?
I have been getting sporadic bounce messages that shouldn't be coming to
me, as well....