diff --git a/tests/emails/.gitattributes b/tests/emails/.gitattributes
new file mode 100644
index 0000000..1e01fd4
--- /dev/null
+++ b/tests/emails/.gitattributes
@@ -0,0 +1 @@
+*.zstd filter=lfs diff=lfs merge=lfs -text
diff --git a/tests/emails/.gitignore b/tests/emails/.gitignore
new file mode 100644
index 0000000..18e5b03
--- /dev/null
+++ b/tests/emails/.gitignore
@@ -0,0 +1 @@
+*.mbox
diff --git a/tests/emails/aero100.mbox.zstd b/tests/emails/aero100.mbox.zstd
new file mode 100644
index 0000000..fea64e0
--- /dev/null
+++ b/tests/emails/aero100.mbox.zstd
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:26ef794e27662426602351335f1847d3497d40068422b59042b4bf2bf3b700d5
+size 15844589