Imports github.com/emersion/go-msgauth/dkim golang.org/x/crypto/ed25519 golang.org/x/net/proxy Standard library imports bytes crypto crypto/tls crypto/x509 encoding/base64 encoding/pem errors fmt io mime mime/quotedprintable net net/http net/mail net/smtp net/textproto net/url os path/filepath regexp strconv strings sync time