nanog mailing list archives
Re: How to never see dupes again (was: someone at ti.com - dups)
From: "John A. Tamplin" <jat () liveonthenet com>
Date: Thu, 18 Mar 1999 10:24:03 -0600 (CST)
On Thu, 18 Mar 1999, Stephen Sprunk wrote:
Sick of misconfigured majordomos, incessant cross-posters, and occaisional operator error? Put in .procmailrc: # Use a cache of Message IDs received to avoid duplicate messages # (i.e. same message posted to two [or more] mailing lists will be # delivered only once [to first matching procmail rule.) :0 Wh:.msgid.cache.lock | formail -D 8192 .msgid.cache
Beware that while Message IDs are supposed to be unique, some clients do not actually guarantee uniqueness. We run the Cyrus local delivery agent, and used to have it configured to drop duplicate message IDs. However, we had complaints from customers not getting their email from certain people and upon investigation we found that the Message IDs were being reused. So, we reluctantly disabled this feature. Those mail clients may have been updated by now, but I am certain that some remain. Also, much of the time I see duplicates on mailing lists they get new message IDs as they pass through the list mechanism so it wouldn't help you anyway in those cases. John A. Tamplin Traveller Information Services jat () LiveOnTheNet COM 2104 West Ferry Way 256/705-7007 - FAX 256/705-7100 Huntsville, AL 35801
Current thread:
- How to never see dupes again (was: someone at ti.com - dups) Stephen Sprunk (Mar 18)
- Re: How to never see dupes again (was: someone at ti.com - dups) John A. Tamplin (Mar 18)
- Re: How to never see dupes again (was: someone at ti.com - dups) christopher williams (Mar 18)
- Re: How to never see dupes again (was: someone at ti.com - dups) Hank Nussbacher (Mar 18)
- Re: How to never see dupes again (was: someone at ti.com - dups) Jared Mauch (Mar 18)