/usr/lib/aspell/email.amf is in libaspell15 0.60.7~20110707-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | MODE email
ASPELL >=0.60
DESCRIPTION mode for skipping quoted text in email messages
FILTER url
FILTER email
|