Users with large mailing lists will experience a
problem related to overuse of server memory.
To make a long story short, if you have any more than
say, 800 members, your server's memory will probably go
through the roof and the script will start spitting out
errors saying sendmail is failing.
Download the following file:
http://karlcore.com/feeds/sendemail.zip
(this file will also be posted to the Ver 1.1.1 feed as
well as the files list here in Sourceforge)
This is a direct replacement for the file located at:
/adminpanel/scripts/sendemail.php
This new file will cause the script to pause exactly 1
second between e-mails, which will keep the server
memory from getting too jammed up. This fix has been
on 4,000+ e-mails with no problem.