Email filters conditions

Hi,

We have set up email filters and ignore emails if it comes from certain users which we consider as spam and put them in the junk folder. For this purpose we have setup the conditions using the condition builder. As per the wikis Email Filters - ServiceNow Wiki the value entered in conditions is case-sensitive.

We've started getting many spams where, for example, the domain ends with 'ASIA'   and several variations of it with a mix of upper/lower case letters. So,   we get 'ASIa', 'asIA', 'asiA' etc. How can I ignore the case in the conditions.

Thanks,
Shalini