what I'm looking to do, and I'm not even sure something like this is possible entirely... is have a postfix mail server (well, postfix won't be able to do it, but perhaps a plugin of sorts), auto attach a mail signature to an outgoing mail file, not a disclaimer per-se, as altermime can easily take care of that, but a unique mail signature based on the user, now, I know that doing this on SMTP is, well pretty much not going to work, but what if you were on a pop-before-smtp system? or even if the system was able to look through the mail headers and mod the mail based on that? or is it too late once it's in that queue?

thoughts? comments?