Functionality

Moxtools is a web app for inspecting mail infrastructure, serving as a showcase for reusing some of the Go packages of https://github.com/mjl-/mox, an email server. See https://pkg.go.dev/github.com/mjl-/mox#section-directories.

Moxtools runs at https://tools.xmox.nl, but you can easily run it locally without the rate limiting.

Similar functionality is also included in mox as subcommands (cli).

Analyse SMTP server settings for a domain, looking up information in DNS (DNSSEC, MX, SPF, DMARC, TLSRPT, DANE, MTA-STS), and connecting to at most 2 SMTP servers.
Verify the DKIM signatures in a message.
Check SPF result for a given sending IP address for a given sender domain name.
Lookup DKIM record given a selector and domain.

Running locally

Or compile it yourself (with a recent Go toolchain):

go install github.com/mjl-/moxtools@latest

Now run:

./moxtools

Name		Name	Last commit message	Last commit date
Latest commit History 8 Commits
.github/workflows		.github/workflows
s		s
vendor		vendor
.gitignore		.gitignore
LICENSE.MIT		LICENSE.MIT
Makefile		Makefile
README.md		README.md
api.ts		api.ts
app.ts		app.ts
go.mod		go.mod
go.sum		go.sum
lib.ts		lib.ts
main.go		main.go
package-lock.json		package-lock.json
package.json		package.json
tools.go		tools.go
tsc.sh		tsc.sh