Lyris User's Guide
[previous] [next] [contents]
Allow Duplicate Posting
Table of Contents
Introduction
Lyris Email Commands
Web Interface for Users
Server Administrator
Site Administrator
Overview of Site Administrator
Site Admin Menu
Site Info
Topics
Mailing Lists
Mailing Lists First Page
Basic Information
World-Wide-Web Urls
Headers and Footers
Security for Subscribers
Security of List Information
Confirmations
Posting Privileges and Moderation
Admin Send
Password Required
Moderated
Approve Number
Release Days
Release Time
Non-Members Can Post
Reject Email Submissions
Allow Crossposting
Allow Duplicate Posting
Crossposting and Duplicates
Max Posts Per Member
Max Quoting Allowed
Allow Blank Subject
Child List
Documents
Limits
Email Headers
Archives
Error Mail Handling
Informational
Programming Extensions at the List Level
Miscellaneous List Config Settings
Limits (changeable only by site admin)
Site Documents
Site Action Phrases
Auto-Responder
Site People
Site Admin Log
List Administrator
Other Topics
Add-On Packages
Installing and Upgrading
Appendix
Frequently Asked Questions

Allow Duplicate Posting

A duplicate posting occurs when one person attempts to post a seemingly identical message to the same mailing list, more than once in one day.

Lyris looks at the first 200 characters to determine if a posting appears to be a duplicate. The reason for this is that some "automatic answer" programs (such as the "vacation" program) will automatically reply to anything they receive by adding a "I'm on vacation" sentence to the top of the message, and quote the rest of the message. Lyris will catch the duplicate posting, since the top of the message will be identical.

Normally, duplicate postings are the result of the author not being careful, and sending the same message twice, or of some Internet mail error, where the same message is delivered twice.

By default, Lyris rejects duplicate postings. Normally, you will want to leave this default setting as it is, since there usually is no good reason why your list members would want to receive the same message twice. Also, this feature is quite effective as a mail-loop prevention technique, when people attach a misbehaving "automatic email answering" program to their email address. Most "vacation" programs are well behaved, and do not answer list-mail (they detect the "Precendence: bulk" message header). However, people sometimes decide to write their own "vacation" program, or other automatic email generating program, and thus can cause problems on a list. This feature takes care of this problem.

Other pages which link to this page:
  • Posting Privileges and Moderation
  • New in Version 2.5
  • Page 250 of 556