docs(all): Add instruction to launch fake smtp server
@@ -103,7 +103,8 @@ match mailer.send(&email) {
## Testing
-The `lettre` tests require an open mail server listening locally on port 2525 and the `sendmail` command.
+The `lettre` tests require an open mail server listening locally on port 2525 and the `sendmail` command. If you have python installed
+such a server can be launched with `python -m smtpd -n -c DebuggingServer localhost:2525`
Alternatively only unit tests can be run by doing `cargo test --lib`.
