Expiration of Spamexperts single filters

Question
What happens with a domain single filter when it expires?
Answer
A Spamexperts domain filter will be auto-renewed at its expiration date, as long as your account balance is sufficient. Otherwise, the filter will auto-expire.
If SpamExperts renewal fails due to insufficient balance, the filter is deleted. The filter will be removed from the Spamexperts servers and all settings, logs, and quarantined e-mails are lost. A deleted filter can not be restored and hence you will have to recreate it and reconfigure the settings if you need to re-activate filtering.