Definitions for "ESMTP"
Keywords:  smtp, sendmail, mta, rfc, syntax
ESMTP is a user configurable relay-only MTA with a sendmail-compatible syntax, based on libESMTP and supporting the AUTH and the StartTLS SMTP extensions.
See Extended Simple Mail Transfer Protocol (ESMTP).
Extended Simple Mail Transfer Protocol. Extensions to the Simple Mail Transfer Protocol, defined in RFC 1869, that allow for additional features.