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Bryan Costales, Claus Assmann, George Jansen, Gregory Shapiro

"sendmail, 4th Edition"


The method for rejecting or removing attachments varies depending on the type of
mailing list software you use, and therefore, we must leave the discovery of that
method up to you.
Some lists discuss matters that, by their very nature, require readers to view or hear
examples. When administrating lists that discuss images or sounds, for example, try
to encourage list members to send web references instead of embedding the images
or sounds directly into eachmessage. The following lines illustrate one appropriate
technique:
I put my latest 3D images up for you to see at
http://www.my.domain/3d/bob/newimages. Let me know
if you like them.
Here, a half kilobyte message distributes images vastly more efficiently than would a
potentially two or three megabyte message that embedded the images directly inside
itself. Because of that efficiency, use of references is kinder to ISP machines, and
reduces the risk that the images will be removed or email rejected because they have
attachments.
13.6.3 Don??™t Pack Addresses in Headers
Hands down, the most offensive way to email a message to a mailing list is by placing
all the recipients into a To: or CC: header or both. Not only will this likely mark
you as a spammer, but it also risks that your site will become listed at one or more
blacklisting sites.
Never send mail to a mailing list like this:
To: list-owner@mailing.


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