# The LMTP class

RFC 2033 defines the Local Mail Transport Protocol. In many ways, this is very similar to SMTP, but with no guarantees of queuing. It is, in a sense, an alternative to ESMTP, and is often used for local mail routing (e.g. from a Mail Transport Agent to a local command or system) where the unreliability of internet connectivity is not an issue.

The `LMTP` class subclasses the `SMTP` class and its only functional difference is that it implements the `LHLO` command, and prohibits the use of `HELO` and `EHLO`.