Index: mail/Makefile
===================================================================
--- mail/Makefile
+++ mail/Makefile
@@ -506,6 +506,7 @@
     SUBDIR += py-milter
     SUBDIR += py-notmuch
     SUBDIR += py-notmuch2
+    SUBDIR += py-offlineimap3
     SUBDIR += py-postfix-mta-sts-resolver
     SUBDIR += py-premailer
     SUBDIR += py-pymailq
Index: mail/py-offlineimap3/Makefile
===================================================================
--- /dev/null
+++ mail/py-offlineimap3/Makefile
@@ -0,0 +1,81 @@
+PORTNAME=	offlineimap3
+PORTVERSION=	8.0.0
+DISTVERSIONPREFIX=	v
+CATEGORIES=	mail python
+PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
+
+MAINTAINER=	dereks@lifeofadishwasher.com
+COMMENT=	Two-way synchronization of local Maildir and IMAP folders
+
+LICENSE=	GPLv2
+LICENSE_FILE=	${WRKSRC}/COPYING
+
+# setup.py requires these during build time. Possible move to setup/install_requires:
+# https://github.com/OfflineIMAP/offlineimap3/issues/110
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}distro>=0:sysutils/py-distro@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}imaplib2>=3.5:mail/py-imaplib2@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}rfc6555>=0:mail/py-rfc6555@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}sqlite3>=0:databases/py-sqlite3@${PY_FLAVOR}
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}certifi>=2020.6.20:security/py-certifi@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}distro>=0:sysutils/py-distro@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}imaplib2>=3.5:mail/py-imaplib2@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}rfc6555>=0:mail/py-rfc6555@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}sqlite3>=0:databases/py-sqlite3@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}urllib3>=1.25.9:net/py-urllib3@${PY_FLAVOR}
+TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest@${PY_FLAVOR}
+
+USES=		python
+
+# Project is currently not publishing to pypi sdist.  pypi/naming status:
+# https://github.com/OfflineIMAP/offlineimap3/issues/111
+USE_GITHUB=	yes
+GH_ACCOUNT=	OfflineIMAP
+
+USE_PYTHON=	autoplist concurrent distutils
+
+CONFLICTS_INSTALL=	mail/py-offlineimap
+
+NO_ARCH=	yes
+
+PORTDOCS=	*
+PORTEXAMPLES=	offlineimap.conf
+
+OPTIONS_DEFINE=		DOCS EXAMPLES GSSAPI MANPAGES
+OPTIONS_DEFAULT=	MANPAGES
+
+COMMON_BUILD_DEPENDS=	a2x:textproc/asciidoc \
+			gmake:devel/gmake
+
+DOCS_BUILD_DEPENDS=	${COMMON_BUILD_DEPENDS} \
+			${PYTHON_PKGNAMEPREFIX}sphinx>=0:textproc/py-sphinx@${PY_FLAVOR}
+
+GSSAPI_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}gssapi>=1.6.9:security/py-gssapi@${PY_FLAVOR}
+
+MANPAGES_BUILD_DEPENDS=	${COMMON_BUILD_DEPENDS}
+MANPAGES_PLIST_FILES+=	man/man1/offlineimap.1.gz \
+			man/man7/offlineimapui.7.gz
+
+post-build-DOCS-on:
+	${MKDIR} ${STAGEDIR}${DOCSDIR}
+	cd ${WRKSRC}/docs && ${GMAKE} docs && \
+	cd html && \
+	${COPYTREE_SHARE} . ${STAGEDIR}${DOCSDIR} \
+		'! ( -name .lock -or -name .buildinfo )'
+
+post-build-MANPAGES-on:
+	${MKDIR} ${STAGEDIR}${MAN7PREFIX}/man/man7/
+	${MKDIR} ${STAGEDIR}${MAN7PREFIX}/man/man1/
+	cd ${WRKSRC}/docs && ${GMAKE} man && \
+	${INSTALL_MAN} offlineimapui.7 ${STAGEDIR}${MAN7PREFIX}/man/man7/ && \
+	${INSTALL_MAN} offlineimap.1 ${STAGEDIR}${MAN1PREFIX}/man/man1/
+
+post-install-EXAMPLES-on:
+	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
+	${INSTALL_DATA} ${WRKSRC}/offlineimap.conf ${STAGEDIR}${EXAMPLESDIR}
+
+do-test:
+	@cd ${WRKSRC} && \
+	${CP} test/credentials.conf.sample test/credentials.conf && \
+	${PYTHON_CMD} -m pytest -v -rs -o addopts= test/
+
+.include <bsd.port.mk>
Index: mail/py-offlineimap3/distinfo
===================================================================
--- /dev/null
+++ mail/py-offlineimap3/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1645914524
+SHA256 (OfflineIMAP-offlineimap3-v8.0.0_GH0.tar.gz) = 5d40c163ca2fbf89658116e29f8fa75050d0c34c29619019eee1a84c90fcab32
+SIZE (OfflineIMAP-offlineimap3-v8.0.0_GH0.tar.gz) = 702509
Index: mail/py-offlineimap3/pkg-descr
===================================================================
--- /dev/null
+++ mail/py-offlineimap3/pkg-descr
@@ -0,0 +1,4 @@
+OfflineIMAP is software that downloads your email mailbox(es) as
+local Maildirs. OfflineIMAP will synchronize both sides via IMAP.
+
+WWW: https://github.com/OfflineIMAP/offlineimap3