Skip Navigational Links
LISTSERV email list manager
LISTSERV - COMMUNITY.EMAILOGY.COM
LISTSERV Menu
Log In
Log In
LISTSERV 17.5 Help - LSTOWN-L Archives
LISTSERV Archives
LISTSERV Archives
Search Archives
Search Archives
Register
Register
Log In
Log In

LSTOWN-L Archives

LISTSERV List Owners' Forum

LSTOWN-L

Menu
LISTSERV Archives LISTSERV Archives
LSTOWN-L Home LSTOWN-L Home

Log In Log In
Register Register

Subscribe or Unsubscribe Subscribe or Unsubscribe

Search Archives Search Archives
Options: Use Forum View

Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
Filtering on MIME header content
From:
Hal Keen <[log in to unmask]>
Reply To:
LISTSERV list owners' forum <[log in to unmask]>
Date:
Mon, 9 Jul 2007 12:31:36 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (25 lines)
Is there a way to filter posts based on the content of the MIME header?

I've just discovered that my list allows something through which triggers a
flood of rejections because of security concerns. It was an attachment of
the .url type.

The problem is that we need to allow attachments with the MIME Content-Type
of "application/octet-stream"; we exchange files that are often conveyed
that way in the course of our work. However, if such a file carries a .url
extension, it is (wisely) considered unsafe by many email servers, producing
a flood of rejections. (I've gotten 15 so far, some for multiple
subscribers--and that's only the ones that slipped past the error summary!)

I was hoping, therefore, to filter on the file extension, and just refuse to
allow the string ".url" to be sent at all. However, I can't seem to find a
way to catch it in the content filters. LISTSERV appears to regard material
in MIME headers as neither a header entry (so I can't write a filter
starting with "Content-Type:") or message text (so I can't just filter on
".url" itself).

Is there a way to do this? or is that part of a message just plain immune to
examination by LISTSERV?

Hal Keen

ATOM RSS1 RSS2

COMMUNITY.EMAILOGY.COM CataList Email List Search Powered by LISTSERV