On Tue, 18 Jun 2019 at 15:19, Jeff Beard <[log in to unmask]> wrote: > Slightly off-topic, but do you (or does anybody) know how to configure > Postfix so that it will "accept all mail from LISTSERV unconditionally" and > still send the bounce message back to Listserv? I don’t think Postfix does that by default. You or your admin has set up postfix defensively as you would if it’s reachable from the internet inbound. If postfix runs on the same server as listserv, you need to set it so that internal network IP addresses such as localhost are trusted. This way all mail from LISTSERV will be queued, not rejected during the conversation. If postfix then has a problem delivering it can return the mail a few minutes / days / hours later and LISTSERV will handle. I’ve run postfix on my CentOS server with Listserv Lite Free edition for many years. I don’t see this issue, so it is down to your admins anti-spam security configuration. James ############################ To unsubscribe from the LSTSRV-L list: write to: mailto:[log in to unmask] or click the following link: http://peach.ease.lsoft.com/scripts/wa-PEACH.exe?SUBED1=LSTSRV-L&A=1