I allow our users to opt-in and out of spam rejection at SMTP time. I use Exim and SpamAssassin to score messages.
I use the scheme where I record the opt-in status of the first RCPT user and do a retry-later rejection for subsequent users who do not have the same status. If the first user has opted in then I can reject at the end of the DATA phase if the message exceeds the rejection threshold. This scheme has been working fine for several months. I now have one site which re-queues for all recipients if any one of them gets a retry-later, so they never get a message to us if it has multiple recipients with mixed opt-in statuses. I would prefer not to add a whitelisting scheme to let them by-pass spam rejection. They claim that nowhere else can be doing what we are doing because we are the only site they have a problem with. I claim that they are acting differently from everywhere else because we have not had the problem reported from anywhere else. I bit of an imapasse! It appears to me from statements in their e-mail that their MTA software is home-grown. I am looking for concrete evidence that what I am doing is not unusual, so can you please let me know if your system uses the same scheme to allow opt-in for SMTP-time spam rejection? Thanks in advance, Phil. -------------------- Phil Chambers Postmaster University of Exeter -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
