Robuta

https://www.rfc-editor.org/rfc/rfc3848 RFC 3848: ESMTP and LMTP Transmission Types Registration rfc 3848 esmtp lmtp transmission https://mail-archive.com/debian-bugs-dist@lists.debian.org/msg2045307.html (maildrop's security model different from procmail's, problematic with esmtp) s security different from maildrop model procmail https://www.abclinuxu.cz/poradna/linux/show/198644 esmtp, mutt esmtp mutt