Wez Furlong
a412757513
Adds an example docker compose file that can be used to quickly stand up an SMTP sink service that is useful when load testing an SMTP server. The sink has configurable and "realistic" bounce response rates, so that you can excercise queue growth scenarios.
1.5 KiB
Traffic Sink Example
This directory contains a docker compose file that will spawn kumod (the MTA process) in a sink configuration. The SMTP service will pretend to accept most mail and then simply discard it. For the messages it doesn't accept, it will return a failure response based on the contents of the policy/reponses.toml file.
That file encodes the chances of returning a bounce or a transient failure, with that chance being configurable based on the recipient domain. In addition, certain recipient domains include a sample of realistic error responses that have been observed to be produced by that domain in real production traffic.
In addition to that probabalistic bounce behavior, you can explicitly choose a class of response by varying the user portion of the recipient address:
- if the user includes
tempfaila400 tempfail requestedresponse will be generated - if the user includes
permfaila500 permfail requestedresponse will be generated - If the user starts with
450-then response will be450 you said USER. - If the user starts with
250-then message will be accepted and discarded, ignoring the probabalistic bounce settings.
Use this to start the daemon and view the logs:
$ docker compose up
The service will spawn and bind to port 2525 on the host system.
You can then send mail on port 2525, using swaks:
$ docker run --rm -it --net host nicolaka/netshoot \
swaks -f user@example.com -t user@example.com \
--server $HOSTNAME:2525