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