XFMail rules question

[Shaleh]

I just started using XFmail today and am learning it mailbox rules setup.  I
have a mailing list where sometimes mail is from @MyDomain.Org and other
@mydomain.org.  How can I code a rule to catch this.  Currently I have Text:
mydomain.org and Field: Recipients but it does not catch the upper case mail.
Any help appreciated.