4 This is an _extremely simple_ SMTP server designed specifically for
5 running on personal servers with a very small number (~1) users. It
6 is probably best defined in terms of what it does not support:
8 - It does not (yet?) support TLS connections.
9 - It does not allow outbound connections.
10 - It does not spawn threads to allow simultaneous inbound connections.
11 - It does not respond with honest errors on failed deliveries.
13 Apart from the lack of TLS, I consider these features. There's no
14 (obvious) way for LambdaMail to become a source of spam, the lack
15 of multithreaded operation is a built-in rate limiter (not to mention
16 its side effect of making all delivery operations "atomic"), and
17 its penchant for just responding "250 OK" to almost everything means
18 that it doesn't leak information about users on the system.
20 LambdaMail is still under active development and, given that it was
21 written for a single use case, lacks any documentation. However
22 it's a pretty simple Scheme program, so glancing over the code should
28 LambdaMail is free software, and is made available under version 3.0
29 of the GNU General Public License. A copy of this license can be found
30 in the file named COPYING.