diff --git a/knowledge base/send an email from cli.md b/knowledge base/send an email from cli.md
new file mode 100644
index 0000000..9e3957e
--- /dev/null
+++ b/knowledge base/send an email from cli.md	
@@ -0,0 +1,22 @@
+# Send an email from CLI
+
+## TL;DR
+
+```shell
+mail -s "Subject" recipient@mail.server
+echo "" | mail -a attachment.file -s "Subject" recipient@mail.server
+
+# send larger files
+cat file.txt | mail -s "Subject" recipient@mail.server
+
+# make "email-safe" the contents of a file
+uuencode file.txt | mail -s "Subject" recipient@mail.server
+```
+
+## Further readings
+
+- [linux mail command examples]
+- [uuencode]
+
+[linux mail command examples]: https://www.binarytides.com/linux-mail-command-examples
+[uuencode]: https://linux.101hacks.com/unix/uuencode/