apt-get / mailx/ logrotate

[Lindsey Simon]

I installed my own build of sendmail and would like to also have the logrotate
functionality. However logrotate depends on mailx, which in turn depends on 
some mail
server. But apt-get doesn't recognize I have sendmail installed. I don't want 
to install the
debian sendmail package. Is there anything I can do? Like tell my apt-get that 
I do have
sendmail installed?
Thanks
lindsey