Index: mail/Makefile
===================================================================
--- mail/Makefile
+++ mail/Makefile
@@ -513,6 +513,7 @@
     SUBDIR += py-pyspf
     SUBDIR += py-python-slimta
     SUBDIR += py-pyzmail
+    SUBDIR += py-rfc6555
     SUBDIR += py-spf-engine
     SUBDIR += py-validate_email
     SUBDIR += pymsgauth
Index: mail/py-rfc6555/Makefile
===================================================================
--- /dev/null
+++ mail/py-rfc6555/Makefile
@@ -0,0 +1,25 @@
+PORTNAME=	rfc6555
+PORTVERSION=	0.1.0
+DISTVERSIONPREFIX=	v
+CATEGORIES=	mail python
+PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
+
+MAINTAINER=	dereks@lifeofadishwasher.com
+COMMENT=	Happy Eyeballs Algorithm described in RFC 6555
+
+LICENSE=	APACHE20
+LICENSE_FILE=	${WRKSRC}/LICENSE
+
+TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest@${PY_FLAVOR}
+
+USES=		python
+USE_GITHUB=	yes
+GH_ACCOUNT=	sethmlarson
+USE_PYTHON=	autoplist distutils
+
+NO_ARCH=	yes
+
+do-test:
+	@cd ${WRKSRC} && ${PYTHON_CMD} -m pytest -v -rs -o addopts= tests
+
+.include <bsd.port.mk>
Index: mail/py-rfc6555/distinfo
===================================================================
--- /dev/null
+++ mail/py-rfc6555/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1646273914
+SHA256 (sethmlarson-rfc6555-v0.1.0_GH0.tar.gz) = 8a15da0f619227c6938be27c64e844668701bca65205002eda789a4fd883b23f
+SIZE (sethmlarson-rfc6555-v0.1.0_GH0.tar.gz) = 11216
Index: mail/py-rfc6555/pkg-descr
===================================================================
--- /dev/null
+++ mail/py-rfc6555/pkg-descr
@@ -0,0 +1,5 @@
+Synchronous Python implementation of the Happy Eyeballs Algorithm
+described in RFC 6555. Provided with a single file and dead-simple
+API to allow easy vendoring and integration into other projects.
+
+WWW: https://github.com/sethmlarson/rfc6555