Update cheatsheets

mailx

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mailx
+
+> Send and receive mail.
+> More information: <https://manned.org/mailx>.
+
+- Send mail (the content should be typed after the command, and ended with `Ctrl+D`):
+
+`mailx -s "{{subject}}" {{to_addr}}`
+
+- Send mail with content passed from another command:
+
+`echo "{{content}}" | mailx -s "{{subject}}" {{to_addr}}`
+
+- Send mail with content read from a file:
+
+`mailx -s "{{subject}}" {{to_addr}} < {{content.txt}}`
+
+- Send mail to a recipient and CC to another address:
+
+`mailx -s "{{subject}}" -c {{cc_addr}} {{to_addr}}`
+
+- Send mail specifying the sender address:
+
+`mailx -s "{{subject}}" -r {{from_addr}} {{to_addr}}`
+
+- Send mail with an attachment:
+
+`mailx -a {{path/to/file}} -s "{{subject}}" {{to_addr}}`