Junk mail "experience" file?

[sgbouwhu]

When upgrading Thunderbird builds I noticed that the spam-training I had built up in the last few weeks had disappeared, and that even the most obvious spam was hanging out in my inbox again. So is it possible to make a backup of the file that stores the learned spam rules and put it back after I put a new build on my system? If so, what is the name of the file?

[mscott]

When upgrading Thunderbird builds I noticed that the spam-training I had built up in the last few weeks had disappeared, and that even the most obvious spam was hanging out in my inbox again. So is it possible to make a backup of the file that stores the learned spam rules and put it back after I put a new build on my system? If so, what is the name of the file?

Weird. I've never seen my training.dat file get deleted. Are you deleting your profile by accident when you upgrade builds?

In any case, the training file is:

training.dat

and it is located in your profile directory (on windows that's usually:
c:\documents and settings\<user>\Applicatoin Data\Thunderbird\Profiles\default\<weird string\)