github.com/go-email-validator/go-email-validator@v0.0.0-20230409163946-b8b9e6a0552e/pkg/ev/evsmtp (about) error.go mock_smtp.go mock_test.go mx.go mx_test.go proxy.go proxy_test.go send_mail.go send_mail_test.go smtp.go smtp_cache.go smtp_input.go smtp_test.go smtpclient