Mutt

mail through command line

mutt -s "Test from mutt" user@yahoo.com < /tmp/message.txt
mutt -s "Test from mutt" user@yahoo.com < /tmp/message.txt -a /tmp/file.jpg
echo "This is the body" | mutt -s "Testing mutt" user@yahoo.com -a /tmp/XDefd.png

[1]
html로 보내려면,

mutt -e "set content_type=text/html" Email address -s "subject" < test.html

[2]

attachment to multiple recipients

at mutt manual,

-a file [...]
       Attach a file to your message using MIME.  When attaching single
       or multiple files, separating filenames and recipient  addresses
       with  "--" is mandatory, e.g. mutt -a image.jpg -- addr1 or mutt
       -a img.jpg *.png -- addr1 addr2.  The -a option must  be  placed
       at the end of command line options.

addr1 addr2는 띄어써도 되고 --가 필수다.

https://www.cyberciti.biz/tips/sending-mail-with-attachment.html