slendmail

Slendmail

A portmanteau of slack and sendmail

sendmail meets slack

A cron compatible sendmail alternative that sends messages to slack instead of email.

Since most people can't actually send email from their computers these days, send the messages via slack instead.

This is especially useful for homelabbers that can't/don't want to setup something like SES or run their own MTA that can actually send somewhere useful

Configuration

Example toml config file. Should be placed at /etc/slendmail.conf

# best to quote all the strings below. I don't think it's strictly necessary
# but I had weird issues with the go-toml library otherwise
slack_token = "xoxb-123456789012-12345678901234-l;iqwjecacwiejfQWERoifqjwQWE"  # gitleaks:allow this isn't a real token
channel = "#notifications-cron"

Alpine: Add MAILTO to /etc/crontabs/root Ubuntu: Add MAILTO to /etc/crontab

TODO

• More compatibility
• Look for config in more/configurable places
• config docs (the slack side)

Extra Info

• alpine's (busybox's) cron calls sendmail with sendmail -ti
  • -i - ignore dots alone - i.e. finish processing at end of input
  • -t - read headers for to/cc/bcc - not applicable