Compare commits

..

8 Commits

19 changed files with 118 additions and 151 deletions

View File

@@ -15,7 +15,7 @@ jobs:
with:
ref: ${{ github.event.pull_request.head.sha }}
- name: download filtermail
run: curl -L https://kamiokan.de/bin/filtermail -o /usr/local/bin/filtermail && chmod +x /usr/local/bin/filtermail
run: curl -L https://github.com/chatmail/filtermail/releases/download/v0.5.2/filtermail-x86_64 -o /usr/local/bin/filtermail && chmod +x /usr/local/bin/filtermail
- name: run chatmaild tests
working-directory: chatmaild
run: pipx run tox

View File

@@ -6,7 +6,10 @@ build-backend = "setuptools.build_meta"
name = "chatmaild"
version = "0.3"
dependencies = [
"aiosmtpd",
"iniconfig",
"deltachat-rpc-server",
"deltachat-rpc-client",
"filelock",
"requests",
"crypt-r >= 3.13.1 ; python_version >= '3.11'",
@@ -67,7 +70,6 @@ commands =
deps = pytest
pdbpp
pytest-localserver
aiosmtpd
execnet
commands = pytest -v -rsXx {posargs}
"""

View File

@@ -1,3 +1,4 @@
import ipaddress
import os
from pathlib import Path
@@ -20,7 +21,10 @@ def read_config(inipath):
class Config:
def __init__(self, inipath, params):
self._inipath = inipath
self.mail_domain = params["mail_domain"]
if is_valid_ipv4(params["mail_domain"]):
self.mail_domain = f"[{params.get('mail_domain')}]"
else:
self.mail_domain = params["mail_domain"]
self.max_user_send_per_minute = int(params.get("max_user_send_per_minute", 60))
self.max_user_send_burst_size = int(params.get("max_user_send_burst_size", 10))
self.max_mailbox_size = params["max_mailbox_size"]
@@ -76,7 +80,7 @@ class Config:
)
self.tls_cert_mode = "external"
self.tls_cert_path, self.tls_key_path = parts
elif self.mail_domain.startswith("_"):
elif self.mail_domain.startswith("_") or is_valid_ipv4(params["mail_domain"]):
self.tls_cert_mode = "self"
self.tls_cert_path = "/etc/ssl/certs/mailserver.pem"
self.tls_key_path = "/etc/ssl/private/mailserver.key"
@@ -157,3 +161,12 @@ def get_default_config_content(mail_domain, **overrides):
lines.append(line)
content = "\n".join(lines)
return content
def is_valid_ipv4(address: str) -> bool:
"""Check if a mail_domain is an IPv4 address."""
try:
ipaddress.IPv4Address(address)
return True
except ValueError:
return False

View File

@@ -7,7 +7,7 @@ import secrets
import string
from urllib.parse import quote
from chatmaild.config import Config, read_config
from chatmaild.config import Config, is_valid_ipv4, read_config
CONFIG_PATH = "/usr/local/lib/chatmaild/chatmail.ini"
ALPHANUMERIC = string.ascii_lowercase + string.digits
@@ -31,7 +31,15 @@ def create_dclogin_url(email, password):
Uses ic=3 (AcceptInvalidCertificates) so chatmail clients
can connect to servers with self-signed TLS certificates.
"""
return f"dclogin:{quote(email, safe='@')}?p={quote(password, safe='')}&v=1&ic=3"
domain = email.split("@")[-1]
domain_without_brackets = domain.strip("[").strip("]")
if is_valid_ipv4(domain_without_brackets):
imap_host = "&ih=" + domain_without_brackets
smtp_host = "&sh=" + domain_without_brackets
else:
imap_host = ""
smtp_host = ""
return f"dclogin:{quote(email, safe='@[]')}?p={quote(password, safe='')}&v=1{imap_host}{smtp_host}&ic=3"
def print_new_account():

View File

@@ -10,6 +10,7 @@ dependencies = [
"pillow",
"qrcode",
"markdown",
"pytest",
"setuptools>=68",
"termcolor",
"build",
@@ -20,7 +21,6 @@ dependencies = [
"execnet",
"imap_tools",
"deltachat-rpc-client",
"deltachat-rpc-server",
]
[project.scripts]

View File

@@ -1,7 +1,6 @@
import importlib.resources
import io
import os
from contextlib import contextmanager
from pyinfra.operations import files, server, systemd
@@ -11,28 +10,6 @@ def has_systemd():
return os.path.isdir("/run/systemd/system")
@contextmanager
def blocked_service_startup():
"""Prevent services from auto-starting during package installation.
Installs a ``/usr/sbin/policy-rc.d`` that exits 101, blocking any
service from being started by the package manager. This avoids bind
conflicts and CPU/RAM spikes during initial setup. The file is removed
when the context exits.
"""
# For documentation about policy-rc.d, see:
# https://people.debian.org/~hmh/invokerc.d-policyrc.d-specification.txt
files.put(
src=get_resource("policy-rc.d"),
dest="/usr/sbin/policy-rc.d",
user="root",
group="root",
mode="755",
)
yield
files.file("/usr/sbin/policy-rc.d", present=False)
def get_resource(arg, pkg=__package__):
return importlib.resources.files(pkg).joinpath(arg)

View File

@@ -13,7 +13,7 @@ import sys
from pathlib import Path
import pyinfra
from chatmaild.config import read_config, write_initial_config
from chatmaild.config import read_config, write_initial_config, is_valid_ipv4
from packaging import version
from termcolor import colored
@@ -87,11 +87,11 @@ def run_cmd_options(parser):
def run_cmd(args, out):
"""Deploy chatmail services on the remote server."""
ssh_host = args.ssh_host if args.ssh_host else args.config.mail_domain
ssh_host = args.ssh_host if args.ssh_host else args.config.mail_domain.strip("[").strip("]")
sshexec = get_sshexec(ssh_host)
require_iroh = args.config.enable_iroh_relay
strict_tls = args.config.tls_cert_mode == "acme"
if not args.dns_check_disabled:
if not args.dns_check_disabled and not is_valid_ipv4(args.config.mail_domain.strip("[").strip("]")):
remote_data = dns.get_initial_remote_data(sshexec, args.config.mail_domain)
if not dns.check_initial_remote_data(remote_data, strict_tls=strict_tls, print=out.red):
return 1
@@ -101,7 +101,7 @@ def run_cmd(args, out):
env["CHATMAIL_WEBSITE_ONLY"] = "True" if args.website_only else ""
env["CHATMAIL_DISABLE_MAIL"] = "True" if args.disable_mail else ""
env["CHATMAIL_REQUIRE_IROH"] = "True" if require_iroh else ""
if not args.dns_check_disabled:
if not args.dns_check_disabled and not is_valid_ipv4(args.config.mail_domain.strip("[").strip("]")):
env["CHATMAIL_ADDR_V4"] = remote_data.get("A") or ""
env["CHATMAIL_ADDR_V6"] = remote_data.get("AAAA") or ""
deploy_path = importlib.resources.files(__package__).joinpath("run.py").resolve()

View File

@@ -498,6 +498,10 @@ class ChatmailDeployer(Deployer):
name="Install rsync",
packages=["rsync"],
)
apt.packages(
name="Ensure cron is installed",
packages=["cron"],
)
def configure(self):
# This file is used by auth proxy.

View File

@@ -1,32 +1,20 @@
import io
import os
import urllib.request
from chatmaild.config import Config
from pyinfra import host
from pyinfra.facts.deb import DebPackages
from pyinfra.facts.server import Arch, Sysctl
from pyinfra.facts.systemd import SystemdEnabled
from pyinfra.operations import apt, files, server, systemd
from cmdeploy.basedeploy import (
Deployer,
activate_remote_units,
blocked_service_startup,
configure_remote_units,
get_resource,
has_systemd,
)
DOVECOT_VERSION = "2.3.21+dfsg1-3"
DOVECOT_SHA256 = {
("core", "amd64"): "dd060706f52a306fa863d874717210b9fe10536c824afe1790eec247ded5b27d",
("core", "arm64"): "e7548e8a82929722e973629ecc40fcfa886894cef3db88f23535149e7f730dc9",
("imapd", "amd64"): "8d8dc6fc00bbb6cdb25d345844f41ce2f1c53f764b79a838eb2a03103eebfa86",
("imapd", "arm64"): "178fa877ddd5df9930e8308b518f4b07df10e759050725f8217a0c1fb3fd707f",
("lmtpd", "amd64"): "2f69ba5e35363de50962d42cccbfe4ed8495265044e244007d7ccddad77513ab",
("lmtpd", "arm64"): "89f52fb36524f5877a177dff4a713ba771fd3f91f22ed0af7238d495e143b38f",
}
class DovecotDeployer(Deployer):
daemon_reload = False
@@ -38,31 +26,11 @@ class DovecotDeployer(Deployer):
def install(self):
arch = host.get_fact(Arch)
with blocked_service_startup():
debs = []
for pkg in ("core", "imapd", "lmtpd"):
deb = _download_dovecot_package(pkg, arch)
if deb:
debs.append(deb)
if debs:
deb_list = " ".join(debs)
server.shell(
name="Install dovecot packages",
commands=[
f"dpkg --force-confdef --force-confold -i {deb_list} 2> /dev/null || true",
"DEBIAN_FRONTEND=noninteractive apt-get -y --fix-broken install",
f"dpkg --force-confdef --force-confold -i {deb_list}",
],
)
files.put(
name="Pin dovecot packages to block Debian dist-upgrades",
src=io.StringIO(
"Package: dovecot-*\n"
"Pin: version *\n"
"Pin-Priority: -1\n"
),
dest="/etc/apt/preferences.d/pin-dovecot",
)
if has_systemd() and "dovecot.service" in host.get_fact(SystemdEnabled):
return # already installed and running
_install_dovecot_package("core", arch)
_install_dovecot_package("imapd", arch)
_install_dovecot_package("lmtpd", arch)
def configure(self):
configure_remote_units(self.config.mail_domain, self.units)
@@ -95,37 +63,40 @@ def _pick_url(primary, fallback):
return fallback
def _download_dovecot_package(package: str, arch: str):
"""Download a dovecot .deb if needed, return its path (or None)."""
def _install_dovecot_package(package: str, arch: str):
arch = "amd64" if arch == "x86_64" else arch
arch = "arm64" if arch == "aarch64" else arch
pkg_name = f"dovecot-{package}"
sha256 = DOVECOT_SHA256.get((package, arch))
if sha256 is None:
apt.packages(packages=[pkg_name])
return None
installed_versions = host.get_fact(DebPackages).get(pkg_name, [])
if DOVECOT_VERSION in installed_versions:
return None
url_version = DOVECOT_VERSION.replace("+", "%2B")
deb_base = f"{pkg_name}_{url_version}_{arch}.deb"
primary_url = f"https://download.delta.chat/dovecot/{deb_base}"
fallback_url = f"https://github.com/chatmail/dovecot/releases/download/upstream%2F{url_version}/{deb_base}"
primary_url = f"https://download.delta.chat/dovecot/dovecot-{package}_2.3.21%2Bdfsg1-3_{arch}.deb"
fallback_url = f"https://github.com/chatmail/dovecot/releases/download/upstream%2F2.3.21%2Bdfsg1/dovecot-{package}_2.3.21%2Bdfsg1-3_{arch}.deb"
url = _pick_url(primary_url, fallback_url)
deb_filename = f"/root/{deb_base}"
deb_filename = "/root/" + url.split("/")[-1]
match (package, arch):
case ("core", "amd64"):
sha256 = "dd060706f52a306fa863d874717210b9fe10536c824afe1790eec247ded5b27d"
case ("core", "arm64"):
sha256 = "e7548e8a82929722e973629ecc40fcfa886894cef3db88f23535149e7f730dc9"
case ("imapd", "amd64"):
sha256 = "8d8dc6fc00bbb6cdb25d345844f41ce2f1c53f764b79a838eb2a03103eebfa86"
case ("imapd", "arm64"):
sha256 = "178fa877ddd5df9930e8308b518f4b07df10e759050725f8217a0c1fb3fd707f"
case ("lmtpd", "amd64"):
sha256 = "2f69ba5e35363de50962d42cccbfe4ed8495265044e244007d7ccddad77513ab"
case ("lmtpd", "arm64"):
sha256 = "89f52fb36524f5877a177dff4a713ba771fd3f91f22ed0af7238d495e143b38f"
case _:
apt.packages(packages=[f"dovecot-{package}"])
return
files.download(
name=f"Download {pkg_name}",
name=f"Download dovecot-{package}",
src=url,
dest=deb_filename,
sha256sum=sha256,
cache_time=60 * 60 * 24 * 365 * 10, # never redownload the package
)
return deb_filename
apt.deb(name=f"Install dovecot-{package}", src=deb_filename)
def _configure_dovecot(config: Config, debug: bool = False) -> (bool, bool):

View File

@@ -7,6 +7,7 @@ listen = 0.0.0.0
protocols = imap lmtp
auth_mechanisms = plain
auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@[]
{% if debug == true %}
auth_verbose = yes

View File

@@ -14,9 +14,9 @@ class FiltermailDeployer(Deployer):
def install(self):
arch = host.get_fact(facts.server.Arch)
url = f"https://kamiokan.de/bin/filtermail"
url = f"https://github.com/chatmail/filtermail/releases/download/v0.5.2/filtermail-{arch}"
sha256sum = {
"x86_64": "d64db7c295ba1c1c62ae592dd4ddbd179169ff7427382ce3f0d16ed2fb70d919",
"x86_64": "ce24ca0075aa445510291d775fb3aea8f4411818c7b885ae51a0fe18c5f789ce",
"aarch64": "c5d783eefa5332db3d97a0e6a23917d72849e3eb45da3d16ce908a9b4e5a797d",
}[arch]
self.need_restart |= files.download(

View File

@@ -20,7 +20,7 @@ smtpd_tls_key_file={{ config.tls_key_path }}
smtpd_tls_security_level=may
smtp_tls_CApath=/etc/ssl/certs
smtp_tls_security_level=verify
smtp_tls_security_level={{ "verify" if config.tls_cert_mode == "acme" else "encrypt" }}
# Send SNI extension when connecting to other servers.
# <https://www.postfix.org/postconf.5.html#smtp_tls_servername>
smtp_tls_servername = hostname
@@ -54,14 +54,15 @@ smtpd_tls_exclude_ciphers = aNULL, RC4, MD5, DES
tls_preempt_cipherlist = yes
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = {{ config.mail_domain }}
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
# Postfix does not deliver mail for any domain by itself.
# Primary domain is listed in `virtual_mailbox_domains` instead
# and handed over to Dovecot.
mydestination =
mydestination = {{ config.mail_domain }}
local_transport = lmtp:unix:private/dovecot-lmtp
local_recipient_maps =
relayhost =
{% if disable_ipv6 %}
@@ -88,24 +89,6 @@ inet_protocols = ipv4
inet_protocols = all
{% endif %}
# Postfix does not try IPv4 and IPv6 connections
# concurrently as of version 3.7.11.
#
# When relay has both A (IPv4) and AAAA (IPv6) records,
# but broken IPv6 connectivity,
# every second message is delayed by the connection timeout
# <https://www.postfix.org/postconf.5.html#smtp_connect_timeout>
# which defaults to 30 seconds. Reducing timeouts is not a solution
# as this will result in a failure to connect to slow servers.
#
# As a workaround we always prefer IPv4 when it is available.
#
# The setting is documented at
# <https://www.postfix.org/postconf.5.html#smtp_address_preference>
smtp_address_preference=ipv4
virtual_transport = lmtp:unix:private/dovecot-lmtp
virtual_mailbox_domains = {{ config.mail_domain }}
lmtp_header_checks = regexp:/etc/postfix/lmtp_header_cleanup
mua_client_restrictions = permit_sasl_authenticated, reject

View File

@@ -80,7 +80,9 @@ filter unix - n n - - lmtp
127.0.0.1:{{ config.postfix_reinject_port }} inet n - n - 100 smtpd
-o syslog_name=postfix/reinject
-o milter_macro_daemon_name=ORIGINATING
{% if "[" not in config.mail_domain %}
-o smtpd_milters=unix:opendkim/opendkim.sock
{% endif %}
-o cleanup_service_name=authclean
# Local SMTP server for reinjecting incoming filtered mail

View File

@@ -1,3 +1,4 @@
import time
def test_tls_imap(benchmark, imap):
def imap_connect():
imap.connect()

View File

@@ -8,11 +8,11 @@ from chatmaild.config import read_config
from cmdeploy.cmdeploy import main
def test_init(tmp_path, maildomain):
def test_init(tmp_path, maildomain_sanitized):
inipath = tmp_path.joinpath("chatmail.ini")
main(["init", "--config", str(inipath), maildomain])
main(["init", "--config", str(inipath), maildomain_sanitized])
config = read_config(inipath)
assert config.mail_domain == maildomain
assert config.mail_domain.strip("[").strip("]") == maildomain_sanitized
def test_capabilities(imap):
@@ -89,18 +89,16 @@ def test_concurrent_logins_same_account(
assert login_results.get()
def test_no_vrfy(cmfactory, chatmail_config):
ac = cmfactory.get_online_account()
addr = ac.get_config("addr")
def test_no_vrfy(chatmail_config):
domain = chatmail_config.mail_domain
s = smtplib.SMTP(domain)
s = smtplib.SMTP(domain.strip("[").strip("]"))
s.starttls()
s.putcmd("vrfy", f"wrongaddress@{chatmail_config.mail_domain}")
result = s.getreply()
print(result)
s.putcmd("vrfy", addr)
s.putcmd("vrfy", f"echo@{chatmail_config.mail_domain}")
result2 = s.getreply()
print(result2)
assert result[0] == result2[0] == 252

View File

@@ -10,31 +10,31 @@ def test_gen_qr_png_data(maildomain):
@pytest.mark.filterwarnings("ignore::urllib3.exceptions.InsecureRequestWarning")
def test_fastcgi_working(maildomain, chatmail_config):
url = f"https://{maildomain}/new"
def test_fastcgi_working(maildomain_sanitized, chatmail_config):
url = f"https://{maildomain_sanitized}/new"
print(url)
verify = chatmail_config.tls_cert_mode == "acme"
res = requests.post(url, verify=verify)
assert maildomain in res.json().get("email")
assert maildomain_sanitized in res.json().get("email")
assert len(res.json().get("password")) > chatmail_config.password_min_length
@pytest.mark.filterwarnings("ignore::urllib3.exceptions.InsecureRequestWarning")
def test_newemail_configure(maildomain, rpc, chatmail_config):
def test_newemail_configure(maildomain_sanitized, rpc, chatmail_config):
"""Test configuring accounts by scanning a QR code works."""
url = f"DCACCOUNT:https://{maildomain}/new"
url = f"DCACCOUNT:https://{maildomain_sanitized}/new"
for i in range(3):
account_id = rpc.add_account()
if chatmail_config.tls_cert_mode == "self":
# deltachat core's rustls rejects self-signed HTTPS certs during
# set_config_from_qr, so fetch credentials via requests instead
res = requests.post(f"https://{maildomain}/new", verify=False)
res = requests.post(f"https://{maildomain_sanitized}/new", verify=False)
data = res.json()
rpc.add_or_update_transport(account_id, {
"addr": data["email"],
"password": data["password"],
"imapServer": maildomain,
"smtpServer": maildomain,
"imapServer": maildomain_sanitized,
"smtpServer": maildomain_sanitized,
"certificateChecks": "acceptInvalidCertificates",
})
else:

View File

@@ -21,6 +21,8 @@ class TestSSHExecutor:
assert out == out2
def test_perform_initial(self, sshexec, maildomain):
if "[" in maildomain:
pytest.skip("Relay doesn't have a domain")
res = sshexec(
remote.rdns.perform_initial_checks, kwargs=dict(mail_domain=maildomain)
)
@@ -131,7 +133,7 @@ def test_authenticated_from(cmsetup, maildata):
@pytest.mark.parametrize("from_addr", ["fake@example.org", "fake@testrun.org"])
def test_reject_missing_dkim(cmsetup, maildata, from_addr):
domain = cmsetup.maildomain
domain = cmsetup.maildomain.strip("[").strip("]")
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(10)
try:
@@ -143,7 +145,7 @@ def test_reject_missing_dkim(cmsetup, maildata, from_addr):
msg = maildata(
"encrypted.eml", from_addr=from_addr, to_addr=recipient.addr
).as_string()
conn = smtplib.SMTP(cmsetup.maildomain, 25, timeout=10)
conn = smtplib.SMTP(cmsetup.maildomain.strip("[").strip("]"), 25, timeout=10)
conn.starttls()
with conn as s:

View File

@@ -6,8 +6,8 @@ import imap_tools
import pytest
import requests
from cmdeploy.cmdeploy import get_sshexec
from cmdeploy.remote import rshell
from cmdeploy.cmdeploy import get_sshexec
@pytest.fixture
@@ -15,7 +15,7 @@ def imap_mailbox(cmfactory, ssl_context):
(ac1,) = cmfactory.get_online_accounts(1)
user = ac1.get_config("addr")
password = ac1.get_config("mail_pw")
host = user.split("@")[1]
host = user.split("@")[1].strip("[").strip("]")
mailbox = imap_tools.MailBox(host, ssl_context=ssl_context)
mailbox.login(user, password)
mailbox.dc_ac = ac1
@@ -178,7 +178,7 @@ def test_hide_senders_ip_address(cmfactory, ssl_context):
chat.send_text("testing submission header cleanup")
user2.wait_for_incoming_msg()
addr = user2.get_config("addr")
host = addr.split("@")[1]
host = addr.split("@")[1].strip("[").strip("]")
pw = user2.get_config("mail_pw")
mailbox = imap_tools.MailBox(host, ssl_context=ssl_context)
mailbox.login(addr, pw)

View File

@@ -61,8 +61,13 @@ def maildomain(chatmail_config):
@pytest.fixture(scope="session")
def sshdomain(maildomain):
return os.environ.get("CHATMAIL_SSH", maildomain)
def maildomain_sanitized(maildomain):
return maildomain.strip("[").strip("]")
@pytest.fixture(scope="session")
def sshdomain(maildomain_sanitized):
return os.environ.get("CHATMAIL_SSH", maildomain_sanitized)
@pytest.fixture
@@ -75,7 +80,7 @@ def maildomain2():
@pytest.fixture
def sshdomain2(maildomain2):
return os.environ.get("CHATMAIL_SSH2", maildomain2)
return os.environ.get("CHATMAIL_SSH2", maildomain2.strip("[").strip("]"))
def pytest_report_header():
@@ -176,14 +181,14 @@ def ssl_context(chatmail_config):
@pytest.fixture
def imap(maildomain, ssl_context):
return ImapConn(maildomain, ssl_context=ssl_context)
def imap(maildomain_sanitized, ssl_context):
return ImapConn(maildomain_sanitized, ssl_context=ssl_context)
@pytest.fixture
def make_imap_connection(maildomain, ssl_context):
def make_imap_connection(maildomain_sanitized, ssl_context):
def make_imap_connection():
conn = ImapConn(maildomain, ssl_context=ssl_context)
conn = ImapConn(maildomain_sanitized, ssl_context=ssl_context)
conn.connect()
return conn
@@ -227,14 +232,14 @@ class ImapConn:
@pytest.fixture
def smtp(maildomain, ssl_context):
return SmtpConn(maildomain, ssl_context=ssl_context)
def smtp(maildomain_sanitized, ssl_context):
return SmtpConn(maildomain_sanitized, ssl_context=ssl_context)
@pytest.fixture
def make_smtp_connection(maildomain, ssl_context):
def make_smtp_connection(maildomain_sanitized, ssl_context):
def make_smtp_connection():
conn = SmtpConn(maildomain, ssl_context=ssl_context)
conn = SmtpConn(maildomain_sanitized, ssl_context=ssl_context)
conn.connect()
return conn
@@ -321,8 +326,8 @@ class ChatmailACFactory:
"password": password,
# Setting server explicitly skips requesting autoconfig XML,
# see https://datatracker.ietf.org/doc/draft-ietf-mailmaint-autoconfig/
"imapServer": domain,
"smtpServer": domain,
"imapServer": domain.strip("[").strip("]"),
"smtpServer": domain.strip("[").strip("]"),
}
if self.chatmail_config.tls_cert_mode == "self":
transport["certificateChecks"] = "acceptInvalidCertificates"
@@ -454,7 +459,7 @@ class CMSetup:
class CMUser:
def __init__(self, maildomain, addr, password, ssl_context=None):
self.maildomain = maildomain
self.maildomain = maildomain.strip("[").strip("]")
self.addr = addr
self.password = password
self.ssl_context = ssl_context