I have amavisd on Centos 4x, it all (used to) work fine;

this morning I noticed amavisd not running, mail queuing up

# service amavisd start
Starting Mail Virus Scanner (amavisd): ERROR: MISSING REQUIRED BASIC MODULES:
Compress::Zlib
BEGIN failed--compilation aborted at /usr/sbin/amavisd line 171.
[FAILED]

attemping to install Compress::Zlib with perl -MCPAN -e shell
says other things missing:

---- Unsatisfied dependencies detected during
[P/PM/PMQS/Compress-Zlib-2.012.tar.gz] -----
IO::Uncompress::Gunzip
IO::Compress::Gzip
IO::Uncompress::Base
IO::Compress::Gzip::Constants
IO::Compress::Base
IO::Compress::Base::Common
Shall I follow them and prepend them to the queue

then it fails....