[Mailman-Users] from: field

[AllenHost mailman]

I have a customer who has created an announce-only list.  He wants the from:
field to be an email address he specifies, not the list email address.  Can
that be configured?  I don't mind hard-coding it if I know where to look.

No luck with the FAQ wizard or archives on this.  If it's there and I missed
it please give me a steer in the right direction.

Thanks,
Larry