Mail after 10.2.4

[John McGilvary]

After going to 10.2.4, I am getting some real mail issues. Even though 
mail is set to send as plain text, I get my mail back with the below 
error.
Also, while writing mail, I get a drop down error message “Mail Cannot 
Save This Mail”

From: MAILER-DAEMON at mail.maclaunch.com
Date: Sun Feb 16, 2003  2:51:01  PM US/Eastern
To: <luvmymac at mac.com>
Subject: Undeliverable mail: Re: G3 Upgrade ?
Attachments: There is 1 attachment

Failed to deliver to '<g-list at mail.maclaunch.com>'
LIST module(list g-list) reports:
  Your message cannot be posted.
  It is composed using the 'windows-1252' character set,
  and this list accepts ISO-8859-1 only

Reporting-MTA: dns; mail.maclaunch.com

Original-Recipient: rfc822;<g-list at mail.maclaunch.com>
Final-Recipient: LIST;submit
Action: failed
Status: 5.0.0