What is it?

SPAMPAL.EXE is associated with a mail classification program called spampal.

What does it do?

SpamPal sits between your email program and your mailbox, checking your email as you retrieve it. Any email messages that SpamPal considers to be spam will be "tagged" with a special header; you simply configure your email client to filter anything with this header into a separate folder and your spam won't be mixed up with the rest of your email anymore!

More info:

Read more about spampal @ spampal.org