MailHog is built using make, and using this Makefile.
You can install MailHog using:
go get github.com/doctolib/MailHog
MailHog has HTML, CSS and Javascript assets which need to be converted to a go source file using go-bindata.
This must happen before running go build or go install to avoid compilation
errors (e.g., no buildable Go source files in MailHog-UI/assets).
The build should be updated to use go generate (added in Go 1.4) to
preprocess static assets into go source files.
However, this will break backwards compatibility with Go 1.2/1.3.
Releases are built using gox.
Run make release to cross-compile for all available platforms.