Mac Forum / Applications / Eudora / April 2007

Eudora version?

In any case, the absence of dangerous things like "anti-virus" and
"personal firewall" scamware hijacking Eudora's connections or temporary
files eliminates them as possible causes. The next most likely cause of
your problem is a corrupted Eudora Settings file, and the only solid fix
for that is to trash the file and rebuild your settings from scratch.

Other possibilities for a root cause generally fall into the area of
filesystem damage, which is not impossible but is not likely to cause
just one narrow problem. A check with Apple's Disk Utility couldn't hurt
and has some chance of finding the root cause, but I wouldn't put a lot
of hope in that as a fix.