[Exim] included file ... too big (max 1048576)

I'm rather new to exim-4, but a longterm and satisfied user uf exim-3.

Testing my combination of exim-4 and majordomo I got a problem with one of
my lists:

The alias for the list reads

hoax-info-m@???::include:/usr/majordomo/lists/hoax-info
The problem is with

# exim4 -bt hoax-info-m
hoax-info-m@??? cannot be resolved at this time:
error in redirect data: included file /usr/majordomo/lists/hoax-info is too big (max 1048576)

How to increase the limit ?

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Frank Elsner  /                         c/o  Technische Universitaet Berlin   |
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