mail -s Hello -E "set sendmail=\"sendmail:/home/admin/bin/sendmail\"" --alternative --content-name HTML --content-type=text/html -A /dev/shm/html-file --content-name TEXT --content-type=text/plain s...@example.com < text
I have noticed that I do not get content-name set by using above command. I am using mail (GNU Mailutils) 3.7.90-2 [release-3.7-5-gbd46cf8d4-dirty] -- There are 43 messages yet in my incoming mailbox.
