Twin directories of mail:

[DIR]  ftp://ftp.mari-el.ru/pub/internet/mail/
[DIR]  ftp://ftp.uni-weimar.de/pub/mail/
[DIR]  ftp://ftp.parc.xerox.com/pub/MOO/contrib/moocode/mailsystem/mail/
[DIR]  ftp://ftp.parc.xerox.com/pub/MOO/contrib/mail/
[DIR]  ftp://ftp.parc.xerox.com/pub/MOO/mail/
[DIR]  ftp://ftp.parc.xerox.com/pub/cl/cleanup/mail/
[DIR]  ftp://ftp.sds.lcs.mit.edu/pub/mwelborn/mail/
[DIR]  ftp://ftp.python.jp/ftp.python.org/python/mail/
[DIR]  ftp://ftp.kemsu.ru/incoming/sinnerKem/unix_video/etc/mail/
[DIR]  ftp://ftp.kemsu.ru/pub/Software/Unix/mail/
[DIR]  ftp://ftp.dit.upm.es/pub/msdos/mail/
[DIR]  ftp://ftp.sonycsl.co.jp/mirror/eddie.mit.edu/hp95lx/comm/npshp95/spool/mail/
[DIR]  ftp://ftp.sonycsl.co.jp/mirror/eddie.mit.edu/hp95lx/mail/
[DIR]  ftp://ftp.reed.edu/mac/mail/
[DIR]  ftp://ftp.reed.edu/mirrors/faqs/mail/
[DIR]  ftp://ftp.eenet.ee/pub/PC-BSD/PBI/mail/
[DIR]  ftp://ftp.arnes.si/software/software/mail/
[DIR]  ftp://ftp.arnes.si/software/unix/mail/
[DIR]  ftp://ftp.arnes.si/software/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LG/issue83/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LGNET/128/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LGNET/129/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LGNET/issue48/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LGNET/issue49/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LGNET/issue50/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LGNET/issue83/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LG/issue48/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LG/issue49/misc/mail/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/LG/issue50/misc/mail/
[DIR]  ftp://ftp.linux.it/pub/People/rubini/etlinux/etlinux-1.1.3/etlinux-1.1.3-pkg/arm/arm-cross-hhl/sample-post.bin/var/spool/mail/
[DIR]  ftp://ftp.linux.it/pub/People/rubini/etlinux/etlinux-1.1.3/etlinux-1.1.3-pkg/i386-host-native/host-native/ettcl-smtp.bin/var/spool/mail/
[DIR]  ftp://ftp.linux.it/pub/People/rubini/etlinux/etlinux-1.1.3/etlinux-1.1.3-pkg/i386-host-native/host-native/sample-post.bin/var/spool/mail/
[DIR]  ftp://ftp.linux.it/pub/People/rubini/etlinux/etlinux-1.1.3/etlinux-1.1.3-pkg/i386-native-libc5/i386-native-libc5/ettcl-smtp.bin/var/spool/mail/
[DIR]  ftp://ftp.linux.it/pub/People/rubini/etlinux/etlinux-1.1.3/etlinux-1.1.3-pkg/i386-native-libc5/i386-native-libc5/sample-post.bin/var/spool/mail/
[DIR]  ftp://ftp.linux.it/pub/People/rubini/etlinux/etlinux-1.1.3/etlinux-1.1.3-pkg/ppc-host-native/host-native/ettcl-smtp.bin/var/spool/mail/
[DIR]  ftp://ftp.linux.it/pub/People/rubini/etlinux/etlinux-1.1.3/etlinux-1.1.3-pkg/ppc-host-native/host-native/sample-post.bin/var/spool/mail/
[DIR]  ftp://ftp.linux.it/pub/People/rubini/etlinux/etlinux-1.1.3/etlinux-1.1.3-pkg/arm/arm-cross-hhl/ettcl-smtp.bin/var/spool/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/weekly.1/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/nightly.6/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/weekly.0/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/nightly.5/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/nightly.4/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/nightly.3/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/nightly.0/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/nightly.1/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/nightly.2/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/magoo(0118052894)_dfpm_uHomes_SM_1218465977_2604.164/eulisp/mail/
[DIR]  ftp://ftp.bath.ac.uk/pub/.snapshot/hourly.0/eulisp/mail/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/system/bbs/mail/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/system/mail/