emersion/go-smtp

📤 An SMTP library for Go clients and servers

emersion/go-msgauth

🔏 A Go library and tools for DKIM, DMARC and Authentication-Results

jcmturner/gokrb5

Pure Go Kerberos library for clients and services

xdg-go/scram

Go implementation of RFC-5802 Salted Challenge Response Authentication Mechanism (SCRAM)

1Password/srp

A set of Go functions for Secure Remote Password protocol implementation in 1Password Teams

Azure/go-ntlmssp

NTLM/Negotiate authentication over HTTP