diff --git a/KEYWORDS b/KEYWORDS
index 26331e5c..2a64868a 100644
--- a/KEYWORDS
+++ b/KEYWORDS
@@ -88,6 +88,7 @@ Stride
 Syslog
 Techulus
 Telegram
+Threema Gateway
 Twilio
 Twist
 Twitter
diff --git a/README.md b/README.md
index 5764a7da..b05b3b3b 100644
--- a/README.md
+++ b/README.md
@@ -146,6 +146,7 @@ The table below identifies the services this tool supports and some example serv
 | [Signal API](https://github.com/caronc/apprise/wiki/Notify_signal) | signal://  or signals:// | (TCP) 80 or 443  | signal://hostname:port/FromPhoneNo<br/>signal://hostname:port/FromPhoneNo/ToPhoneNo<br/>signal://hostname:port/FromPhoneNo/ToPhoneNo1/ToPhoneNo2/ToPhoneNoN/
 | [Sinch](https://github.com/caronc/apprise/wiki/Notify_sinch) | sinch://  | (TCP) 443   | sinch://ServicePlanId:ApiToken@FromPhoneNo<br/>sinch://ServicePlanId:ApiToken@FromPhoneNo/ToPhoneNo<br/>sinch://ServicePlanId:ApiToken@FromPhoneNo/ToPhoneNo1/ToPhoneNo2/ToPhoneNoN/<br/>sinch://ServicePlanId:ApiToken@ShortCode/ToPhoneNo<br/>sinch://ServicePlanId:ApiToken@ShortCode/ToPhoneNo1/ToPhoneNo2/ToPhoneNoN/
 | [SMSEagle](https://github.com/caronc/apprise/wiki/Notify_smseagle) | smseagle://  or smseagles:// | (TCP) 80 or 443  | smseagles://hostname:port/ToPhoneNo<br/>smseagles://hostname:port/@ToContact<br/>smseagles://hostname:port/#ToGroup<br/>smseagles://hostname:port/ToPhoneNo1/#ToGroup/@ToContact/
+| [Threema Gateway](https://github.com/caronc/apprise/wiki/Notify_threema) | threema://  | (TCP) 443   | threema://GatewayID@secret/ToPhoneNo<br/>threema://GatewayID@secret/ToEmail<br/>threema://GatewayID@secret/ToThreemaID/<br/>threema://GatewayID@secret/ToEmail/ToThreemaID/ToPhoneNo/...
 | [Twilio](https://github.com/caronc/apprise/wiki/Notify_twilio) | twilio://  | (TCP) 443   | twilio://AccountSid:AuthToken@FromPhoneNo<br/>twilio://AccountSid:AuthToken@FromPhoneNo/ToPhoneNo<br/>twilio://AccountSid:AuthToken@FromPhoneNo/ToPhoneNo1/ToPhoneNo2/ToPhoneNoN/<br/>twilio://AccountSid:AuthToken@FromPhoneNo/ToPhoneNo?apikey=Key<br/>twilio://AccountSid:AuthToken@ShortCode/ToPhoneNo<br/>twilio://AccountSid:AuthToken@ShortCode/ToPhoneNo1/ToPhoneNo2/ToPhoneNoN/
 | [Voipms](https://github.com/caronc/apprise/wiki/Notify_voipms) | voipms://  | (TCP) 443   | voipms://password:email/FromPhoneNo<br/>voipms://password:email/FromPhoneNo/ToPhoneNo<br/>voipms://password:email/FromPhoneNo/ToPhoneNo1/ToPhoneNo2/ToPhoneNoN/
 | [Vonage](https://github.com/caronc/apprise/wiki/Notify_nexmo) (formerly Nexmo) | nexmo://  | (TCP) 443   | nexmo://ApiKey:ApiSecret@FromPhoneNo<br/>nexmo://ApiKey:ApiSecret@FromPhoneNo/ToPhoneNo<br/>nexmo://ApiKey:ApiSecret@FromPhoneNo/ToPhoneNo1/ToPhoneNo2/ToPhoneNoN/
diff --git a/apprise/URLBase.py b/apprise/URLBase.py
index 1cea66d1..3c969753 100644
--- a/apprise/URLBase.py
+++ b/apprise/URLBase.py
@@ -550,7 +550,7 @@ class URLBase:
         return paths
 
     @staticmethod
-    def parse_list(content, unquote=True):
+    def parse_list(content, allow_whitespace=True, unquote=True):
         """A wrapper to utils.parse_list() with unquoting support
 
         Parses a specified set of data and breaks it into a list.
@@ -559,6 +559,9 @@ class URLBase:
             content (str): The path to split up into a list. If a list is
                  provided, then it's individual entries are processed.
 
+            allow_whitespace (:obj:`bool`, optional): whitespace is to be
+                 treated as a delimiter
+
             unquote (:obj:`bool`, optional): call unquote on each element
                  added to the returned list.
 
@@ -566,7 +569,7 @@ class URLBase:
             list: A unique list containing all of the elements in the path
         """
 
-        content = parse_list(content)
+        content = parse_list(content, allow_whitespace=allow_whitespace)
         if unquote:
             content = \
                 [URLBase.unquote(x) for x in filter(bool, content)]
diff --git a/apprise/plugins/NotifyThreema.py b/apprise/plugins/NotifyThreema.py
new file mode 100644
index 00000000..719401f6
--- /dev/null
+++ b/apprise/plugins/NotifyThreema.py
@@ -0,0 +1,370 @@
+# -*- coding: utf-8 -*-
+# BSD 2-Clause License
+#
+# Apprise - Push Notification Library.
+# Copyright (c) 2023, Chris Caron <lead2gold@gmail.com>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice,
+#    this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+# Create an account https://gateway.threema.ch/en/ if you don't already have
+# one
+#
+# Read more about Threema Gateway API here:
+#   - https://gateway.threema.ch/en/developer/api
+
+import requests
+from itertools import chain
+
+from .NotifyBase import NotifyBase
+from ..common import NotifyType
+from ..utils import is_phone_no
+from ..utils import validate_regex
+from ..utils import is_email
+from ..URLBase import PrivacyMode
+from ..utils import parse_list
+from ..AppriseLocale import gettext_lazy as _
+
+
+class ThreemaRecipientTypes:
+    """
+    The supported recipient specifiers
+    """
+    THREEMA_ID = 'to'
+    PHONE = 'phone'
+    EMAIL = 'email'
+
+
+class NotifyThreema(NotifyBase):
+    """
+    A wrapper for Threema Gateway Notifications
+    """
+
+    # The default descriptive name associated with the Notification
+    service_name = 'Threema Gateway'
+
+    # The services URL
+    service_url = 'https://gateway.threema.ch/'
+
+    # The default protocol
+    secure_protocol = 'threema'
+
+    # A URL that takes you to the setup/help of the specific protocol
+    setup_url = 'https://github.com/caronc/apprise/wiki/Notify_threema'
+
+    # Threema Gateway uses the http protocol with JSON requests
+    notify_url = 'https://msgapi.threema.ch/send_simple'
+
+    # The maximum length of the body
+    body_maxlen = 3500
+
+    # No title support
+    title_maxlen = 0
+
+    # Define object templates
+    templates = (
+        '{schema}://{gateway_id}@{secret}/{targets}',
+    )
+
+    # Define our template tokens
+    template_tokens = dict(NotifyBase.template_tokens, **{
+        'gateway_id': {
+            'name': _('Gateway ID'),
+            'type': 'string',
+            'private': True,
+            'required': True,
+            'map_to': 'user',
+        },
+        'secret': {
+            'name': _('API Secret'),
+            'type': 'string',
+            'private': True,
+            'required': True,
+        },
+        'target_phone': {
+            'name': _('Target Phone No'),
+            'type': 'string',
+            'prefix': '+',
+            'regex': (r'^[0-9\s)(+-]+$', 'i'),
+            'map_to': 'targets',
+        },
+        'target_email': {
+            'name': _('Target Email'),
+            'type': 'string',
+            'map_to': 'targets',
+        },
+        'target_threema_id': {
+            'name': _('Target Threema ID'),
+            'type': 'string',
+            'map_to': 'targets',
+        },
+        'targets': {
+            'name': _('Targets'),
+            'type': 'list:string',
+            'required': True,
+        },
+    })
+
+    # Define our template arguments
+    template_args = dict(NotifyBase.template_args, **{
+        'to': {
+            'alias_of': 'targets',
+        },
+        'from': {
+            'alias_of': 'gateway_id',
+        },
+        'gwid': {
+            'alias_of': 'gateway_id',
+        },
+        'secret': {
+            'alias_of': 'secret',
+        },
+    })
+
+    def __init__(self, secret=None, targets=None, **kwargs):
+        """
+        Initialize Threema Gateway Object
+        """
+        super().__init__(**kwargs)
+
+        # Validate our params here.
+
+        if not self.user:
+            msg = 'Threema Gateway ID must be specified'
+            self.logger.warning(msg)
+            raise TypeError(msg)
+
+        # Verify our Gateway ID
+        if len(self.user) != 8:
+            msg = 'Threema Gateway ID must be 8 characters in length'
+            self.logger.warning(msg)
+            raise TypeError(msg)
+
+        # Verify our secret
+        self.secret = validate_regex(secret)
+        if not self.secret:
+            msg = \
+                'An invalid Threema API Secret ({}) was specified'.format(
+                    secret)
+            self.logger.warning(msg)
+            raise TypeError(msg)
+
+        # Parse our targets
+        self.targets = list()
+
+        # Used for URL generation afterwards only
+        self.invalid_targets = list()
+
+        for target in parse_list(targets, allow_whitespace=False):
+            if len(target) == 8:
+                # Store our user
+                self.targets.append(
+                    (ThreemaRecipientTypes.THREEMA_ID, target))
+                continue
+
+            # Check if an email was defined
+            result = is_email(target)
+            if result:
+                # Store our user
+                self.targets.append(
+                    (ThreemaRecipientTypes.EMAIL, result['full_email']))
+                continue
+
+            # Validate targets and drop bad ones:
+            result = is_phone_no(target)
+            if result:
+                # store valid phone number
+                self.targets.append((
+                    ThreemaRecipientTypes.PHONE, result['full']))
+                continue
+
+            self.logger.warning(
+                'Dropped invalid user/email/phone '
+                '({}) specified'.format(target),
+            )
+            self.invalid_targets.append(target)
+
+        return
+
+    def send(self, body, title='', notify_type=NotifyType.INFO, **kwargs):
+        """
+        Perform Threema Gateway Notification
+        """
+
+        if len(self.targets) == 0:
+            # There were no services to notify
+            self.logger.warning(
+                'There were no Threema Gateway targets to notify')
+            return False
+
+        # error tracking (used for function return)
+        has_error = False
+
+        # Prepare our headers
+        headers = {
+            'User-Agent': self.app_id,
+            'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8',
+            'Accept': '*/*',
+        }
+
+        # Prepare our payload
+        _payload = {
+            'secret': self.secret,
+            'from': self.user,
+            'text': body.encode('utf-8'),
+        }
+
+        # Create a copy of the targets list
+        targets = list(self.targets)
+
+        while len(targets):
+            # Get our target to notify
+            key, target = targets.pop(0)
+
+            # Prepare a payload object
+            payload = _payload.copy()
+
+            # Set Target
+            payload[key] = target
+
+            # Some Debug Logging
+            self.logger.debug(
+                'Threema Gateway GET URL: {} (cert_verify={})'.format(
+                    self.notify_url, self.verify_certificate))
+            self.logger.debug('Threema Gateway Payload: {}' .format(payload))
+
+            # Always call throttle before any remote server i/o is made
+            self.throttle()
+
+            try:
+                r = requests.post(
+                    self.notify_url,
+                    params=payload,
+                    headers=headers,
+                    verify=self.verify_certificate,
+                    timeout=self.request_timeout,
+                )
+
+                if r.status_code != requests.codes.ok:
+                    # We had a problem
+                    status_str = \
+                        NotifyThreema.http_response_code_lookup(
+                            r.status_code)
+
+                    self.logger.warning(
+                        'Failed to send Threema Gateway notification to {}: '
+                        '{}{}error={}'.format(
+                            target,
+                            status_str,
+                            ', ' if status_str else '',
+                            r.status_code))
+
+                    self.logger.debug(
+                        'Response Details:\r\n{}'.format(r.content))
+
+                    # Mark our failure
+                    has_error = True
+                    continue
+
+                # We wee successful
+                self.logger.info(
+                    'Sent Threema Gateway notification to %s' % target)
+
+            except requests.RequestException as e:
+                self.logger.warning(
+                    'A Connection error occurred sending Threema Gateway:%s '
+                    'notification' % target
+                )
+                self.logger.debug('Socket Exception: %s' % str(e))
+
+                # Mark our failure
+                has_error = True
+                continue
+
+        return not has_error
+
+    def url(self, privacy=False, *args, **kwargs):
+        """
+        Returns the URL built dynamically based on specified arguments.
+        """
+
+        # Define any URL parameters
+        params = self.url_parameters(privacy=privacy, *args, **kwargs)
+
+        schemaStr =  \
+            '{schema}://{gatewayid}@{secret}/{targets}?{params}'
+        return schemaStr.format(
+            schema=self.secure_protocol,
+            gatewayid=NotifyThreema.quote(self.user),
+            secret=self.pprint(
+                self.secret, privacy, mode=PrivacyMode.Secret, safe=''),
+            targets='/'.join(chain(
+                [NotifyThreema.quote(x[1], safe='@+') for x in self.targets],
+                [NotifyThreema.quote(x, safe='@+')
+                 for x in self.invalid_targets])),
+            params=NotifyThreema.urlencode(params))
+
+    def __len__(self):
+        """
+        Returns the number of targets associated with this notification
+        """
+        targets = len(self.targets)
+        return targets if targets > 0 else 1
+
+    @staticmethod
+    def parse_url(url):
+        """
+        Parses the URL and returns enough arguments that can allow
+        us to re-instantiate this object.
+        """
+
+        results = NotifyBase.parse_url(url, verify_host=False)
+        if not results:
+            # We're done early as we couldn't load the results
+            return results
+
+        results['targets'] = list()
+
+        if 'secret' in results['qsd'] and len(results['qsd']['secret']):
+            results['secret'] = \
+                NotifyThreema.unquote(results['qsd']['secret'])
+
+        else:
+            results['secret'] = NotifyThreema.unquote(results['host'])
+
+        results['targets'] += \
+            NotifyThreema.split_path(results['fullpath'])
+
+        if 'from' in results['qsd'] and len(results['qsd']['from']):
+            results['user'] = \
+                NotifyThreema.unquote(results['qsd']['from'])
+
+        elif 'gwid' in results['qsd'] and len(results['qsd']['gwid']):
+            results['user'] = \
+                NotifyThreema.unquote(results['qsd']['gwid'])
+
+        if 'to' in results['qsd'] and len(results['qsd']['to']):
+            results['targets'] += \
+                NotifyThreema.parse_list(
+                    results['qsd']['to'], allow_whitespace=False)
+
+        return results
diff --git a/apprise/utils.py b/apprise/utils.py
index 8d644ce9..af84f89d 100644
--- a/apprise/utils.py
+++ b/apprise/utils.py
@@ -96,6 +96,9 @@ VALID_QUERY_RE = re.compile(r'^(?P<path>.*[/\\])(?P<query>[^/\\]+)?$')
 # This is useful when turning a string into a list
 STRING_DELIMITERS = r'[\[\]\;,\s]+'
 
+# String Delimiters without the whitespace
+STRING_DELIMITERS_NO_WS = r'[\[\]\;,]+'
+
 # Pre-Escape content since we reference it so much
 ESCAPED_PATH_SEPARATOR = re.escape('\\/')
 ESCAPED_WIN_PATH_SEPARATOR = re.escape('\\')
@@ -1116,7 +1119,7 @@ def urlencode(query, doseq=False, safe='', encoding=None, errors=None):
         errors=errors)
 
 
-def parse_list(*args, cast=None):
+def parse_list(*args, cast=None, allow_whitespace=True):
     """
     Take a string list and break it into a delimited
     list of arguments. This funciton also supports
@@ -1143,10 +1146,12 @@ def parse_list(*args, cast=None):
             arg = cast(arg)
 
         if isinstance(arg, str):
-            result += re.split(STRING_DELIMITERS, arg)
+            result += re.split(
+                STRING_DELIMITERS if allow_whitespace
+                else STRING_DELIMITERS_NO_WS, arg)
 
         elif isinstance(arg, (set, list, tuple)):
-            result += parse_list(*arg)
+            result += parse_list(*arg, allow_whitespace=allow_whitespace)
 
     #
     # filter() eliminates any empty entries
@@ -1154,7 +1159,9 @@ def parse_list(*args, cast=None):
     # Since Python v3 returns a filter (iterator) whereas Python v2 returned
     # a list, we need to change it into a list object to remain compatible with
     # both distribution types.
-    return sorted([x for x in filter(bool, list(set(result)))])
+    return sorted([x for x in filter(bool, list(set(result)))]) \
+        if allow_whitespace else sorted(
+            [x.strip() for x in filter(bool, list(set(result))) if x.strip()])
 
 
 def is_exclusive_match(logic, data, match_all=common.MATCH_ALL_TAG,
diff --git a/packaging/redhat/python-apprise.spec b/packaging/redhat/python-apprise.spec
index 00c81cdb..f51a1063 100644
--- a/packaging/redhat/python-apprise.spec
+++ b/packaging/redhat/python-apprise.spec
@@ -49,8 +49,8 @@ OneSignal, Opsgenie, PagerDuty, PagerTree, ParsePlatform, PopcornNotify,
 Prowl, Pushalot, PushBullet, Pushjet, PushMe, Pushover, PushSafer, Pushy,
 PushDeer, Reddit, Rocket.Chat, RSyslog, SendGrid, ServerChan, Signal,
 SimplePush, Sinch, Slack, SMSEagle, SMTP2Go, Spontit, SparkPost, Super Toasty,
-Streamlabs, Stride, Syslog, Techulus Push, Telegram, Twilio, Twitter, Twist,
-XBMC, Voipms, Vonage, WhatsApp, Webex Teams}
+Streamlabs, Stride, Syslog, Techulus Push, Telegram, Threema Gateway, Twilio,
+Twitter, Twist, XBMC, Voipms, Vonage, WhatsApp, Webex Teams}
 
 Name:           python-%{pypi_name}
 Version:        1.6.0
diff --git a/test/test_plugin_threema.py b/test/test_plugin_threema.py
new file mode 100644
index 00000000..eb6da871
--- /dev/null
+++ b/test/test_plugin_threema.py
@@ -0,0 +1,178 @@
+# -*- coding: utf-8 -*-
+# BSD 2-Clause License
+#
+# Apprise - Push Notification Library.
+# Copyright (c) 2023, Chris Caron <lead2gold@gmail.com>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice,
+#    this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+from unittest import mock
+
+import pytest
+import requests
+
+from apprise.plugins.NotifyThreema import NotifyThreema
+from helpers import AppriseURLTester
+
+# Disable logging for a cleaner testing output
+import logging
+logging.disable(logging.CRITICAL)
+
+# Our Testing URLs
+apprise_url_tests = (
+    ('threema://', {
+        # No user/secret specified
+        'instance': TypeError,
+    }),
+    ('threema://@:', {
+        # Invalid url
+        'instance': TypeError,
+    }),
+    ('threema://user@secret', {
+        # gateway id must be 8 characters in len
+        'instance': TypeError,
+    }),
+    ('threema://*THEGWID@secret/{targets}/'.format(
+        targets='/'.join(['2222'])), {
+
+        # Invalid target phone number
+        'instance': NotifyThreema,
+        'notify_response': False,
+        'privacy_url': 'threema://%2ATHEGWID@****/2222',
+    }),
+    ('threema://*THEGWID@secret/{targets}/'.format(
+        targets='/'.join(['16134442222'])), {
+
+        # Valid
+        'instance': NotifyThreema,
+        'privacy_url': 'threema://%2ATHEGWID@****/16134442222',
+    }),
+    ('threema://*THEGWID@secret/{targets}/'.format(
+        targets='/'.join(['16134442222', '16134443333'])), {
+
+        # Valid multiple targets
+        'instance': NotifyThreema,
+        'privacy_url': 'threema://%2ATHEGWID@****/16134442222/16134443333',
+    }),
+    ('threema:///?secret=secret&from=*THEGWID&to={targets}'.format(
+        targets=','.join(['16134448888', 'user1@gmail.com', 'abcd1234'])), {
+
+        # Valid
+        'instance': NotifyThreema,
+    }),
+    ('threema:///?secret=secret&gwid=*THEGWID&to={targets}'.format(
+        targets=','.join(['16134448888', 'user2@gmail.com', 'abcd1234'])), {
+
+        # Valid
+        'instance': NotifyThreema,
+    }),
+    ('threema://*THEGWID@secret', {
+        'instance': NotifyThreema,
+        # No targets specified
+        'notify_response': False,
+    }),
+
+    ('threema://*THEGWID@secret/16134443333', {
+        'instance': NotifyThreema,
+        # throw a bizzare code forcing us to fail to look it up
+        'response': False,
+        'requests_response_code': 999,
+    }),
+    ('threema://*THEGWID@secret/16134443333', {
+        'instance': NotifyThreema,
+        # Throws a series of errors
+        'test_requests_exceptions': True,
+    }),
+)
+
+
+def test_plugin_threema():
+    """
+    NotifyThreema() Apprise URLs
+
+    """
+
+    # Run our general tests
+    AppriseURLTester(tests=apprise_url_tests).run_all()
+
+
+@ mock.patch('requests.post')
+def test_plugin_threema_edge_cases(mock_post):
+    """
+    NotifyThreema() Edge Cases
+
+    """
+
+    # Prepare our response
+    response = requests.Request()
+    response.status_code = requests.codes.ok
+
+    # Prepare Mock
+    mock_post.return_value = response
+
+    # Initialize some generic (but valid) tokens
+    gwid = '*THEGWID'
+    secret = 'mysecret'
+    targets = '+1 (555) 123-9876'
+
+    # No email specified
+    with pytest.raises(TypeError):
+        NotifyThreema(user=gwid, secret=None, targets=targets)
+
+    results = NotifyThreema.parse_url(
+        f'threema://?gwid={gwid}&secret={secret}&to={targets}')
+
+    assert isinstance(results, dict)
+    assert results['user'] == gwid
+    assert results['secret'] == secret
+    assert results['password'] is None
+    assert results['port'] is None
+    assert results['host'] == ''
+    assert results['fullpath'] == '/'
+    assert results['path'] == '/'
+    assert results['query'] is None
+    assert results['schema'] == 'threema'
+    assert results['url'] == 'threema:///'
+    assert isinstance(results['targets'], list) is True
+    assert len(results['targets']) == 1
+    assert results['targets'][0] == '+1 (555) 123-9876'
+
+    instance = NotifyThreema(**results)
+    assert len(instance.targets) == 1
+    assert instance.targets[0] == ('phone', '15551239876')
+    assert isinstance(instance, NotifyThreema)
+
+    response = instance.send(title='title', body='body 😊')
+    assert response is True
+    assert mock_post.call_count == 1
+
+    details = mock_post.call_args_list[0]
+    assert details[0][0] == 'https://msgapi.threema.ch/send_simple'
+    assert details[1]['headers']['User-Agent'] == 'Apprise'
+    assert details[1]['headers']['Accept'] == '*/*'
+    assert details[1]['headers']['Content-Type'] == \
+        'application/x-www-form-urlencoded; charset=utf-8'
+    assert details[1]['params']['secret'] == secret
+    assert details[1]['params']['from'] == gwid
+    assert details[1]['params']['phone'] == '15551239876'
+    assert details[1]['params']['text'] == 'body 😊'.encode('utf-8')