diff --git a/src/postorius/tests/fixtures/vcr_cassettes/TestSubscription.test_banned_address.yaml b/src/postorius/tests/fixtures/vcr_cassettes/TestSubscription.test_banned_address.yaml
new file mode 100644
index 0000000..d02772f
--- /dev/null
+++ b/src/postorius/tests/fixtures/vcr_cassettes/TestSubscription.test_banned_address.yaml
@@ -0,0 +1,615 @@
+interactions:
+- request:
+    body: mail_host=example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/domains
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      content-type: [application/json; charset=UTF-8]
+      location: ['http://localhost:9001/3.0/domains/example.com']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/domains/example.com
+  response:
+    body: {string: !!python/unicode '{"base_url": "http://example.com", "description":
+        null, "http_etag": "\"e736411818ff1815ca83575e0958c38c5188f0a4\"", "mail_host":
+        "example.com", "self_link": "http://localhost:9001/3.0/domains/example.com",
+        "url_host": "example.com"}'}
+    headers:
+      content-length: ['233']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: fqdn_listname=open_list%40example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/lists
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      content-type: [application/json; charset=UTF-8]
+      location: ['http://localhost:9001/3.0/lists/open_list.example.com']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Open_list", "fqdn_listname":
+        "open_list@example.com", "http_etag": "\"6726e101e1dd1de6043eee72f741d4c2479f4735\"",
+        "list_id": "open_list.example.com", "list_name": "open_list", "mail_host":
+        "example.com", "member_count": 0, "self_link": "http://localhost:9001/3.0/lists/open_list.example.com",
+        "volume": 1}'}
+    headers:
+      content-length: ['324']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list@example.com/config
+  response:
+    body: {string: !!python/unicode '{"acceptable_aliases": [], "admin_immed_notify":
+        true, "admin_notify_mchanges": false, "administrivia": true, "advertised":
+        true, "allow_list_posts": true, "anonymous_list": false, "archive_policy":
+        "public", "autorespond_owner": "none", "autorespond_postings": "none", "autorespond_requests":
+        "none", "autoresponse_grace_period": "90d", "autoresponse_owner_text": "",
+        "autoresponse_postings_text": "", "autoresponse_request_text": "", "bounces_address":
+        "open_list-bounces@example.com", "collapse_alternatives": true, "convert_html_to_plaintext":
+        false, "created_at": "2005-08-01T07:49:23", "default_member_action": "defer",
+        "default_nonmember_action": "hold", "description": "", "digest_last_sent_at":
+        null, "digest_send_periodic": true, "digest_size_threshold": 30.0, "digest_volume_frequency":
+        "monthly", "digests_enabled": true, "display_name": "Open_list", "filter_content":
+        false, "first_strip_reply_to": false, "fqdn_listname": "open_list@example.com",
+        "goodbye_message_uri": "", "http_etag": "\"3d16b6c6d1bb8fed130bd061c70a0894856a4ca8\"",
+        "include_rfc2369_headers": true, "join_address": "open_list-join@example.com",
+        "last_post_at": null, "leave_address": "open_list-leave@example.com", "list_name":
+        "open_list", "mail_host": "example.com", "next_digest_number": 1, "no_reply_address":
+        "noreply@example.com", "owner_address": "open_list-owner@example.com", "post_id":
+        1, "posting_address": "open_list@example.com", "posting_pipeline": "default-posting-pipeline",
+        "reply_goes_to_list": "no_munging", "reply_to_address": "", "request_address":
+        "open_list-request@example.com", "scheme": "http", "send_welcome_message":
+        true, "subject_prefix": "[Open_list] ", "subscription_policy": "confirm",
+        "volume": 1, "web_host": "example.com", "welcome_message_uri": "mailman:///welcome.txt"}'}
+    headers:
+      content-length: ['1790']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: subscription_policy=open
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'PATCH'
+    uri: http://localhost:9001/3.0/lists/open_list@example.com/config
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+- request:
+    body: fqdn_listname=moderate_subs%40example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/lists
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      content-type: [application/json; charset=UTF-8]
+      location: ['http://localhost:9001/3.0/lists/moderate_subs.example.com']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/moderate_subs.example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Moderate_subs", "fqdn_listname":
+        "moderate_subs@example.com", "http_etag": "\"4cf5a031a451ad84a54e4c708cacda8e676e617f\"",
+        "list_id": "moderate_subs.example.com", "list_name": "moderate_subs", "mail_host":
+        "example.com", "member_count": 0, "self_link": "http://localhost:9001/3.0/lists/moderate_subs.example.com",
+        "volume": 1}'}
+    headers:
+      content-length: ['344']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/moderate_subs@example.com/config
+  response:
+    body: {string: !!python/unicode '{"acceptable_aliases": [], "admin_immed_notify":
+        true, "admin_notify_mchanges": false, "administrivia": true, "advertised":
+        true, "allow_list_posts": true, "anonymous_list": false, "archive_policy":
+        "public", "autorespond_owner": "none", "autorespond_postings": "none", "autorespond_requests":
+        "none", "autoresponse_grace_period": "90d", "autoresponse_owner_text": "",
+        "autoresponse_postings_text": "", "autoresponse_request_text": "", "bounces_address":
+        "moderate_subs-bounces@example.com", "collapse_alternatives": true, "convert_html_to_plaintext":
+        false, "created_at": "2005-08-01T07:49:23", "default_member_action": "defer",
+        "default_nonmember_action": "hold", "description": "", "digest_last_sent_at":
+        null, "digest_send_periodic": true, "digest_size_threshold": 30.0, "digest_volume_frequency":
+        "monthly", "digests_enabled": true, "display_name": "Moderate_subs", "filter_content":
+        false, "first_strip_reply_to": false, "fqdn_listname": "moderate_subs@example.com",
+        "goodbye_message_uri": "", "http_etag": "\"bbeb372001a49a25fa038477abd59e8b3c45a20d\"",
+        "include_rfc2369_headers": true, "join_address": "moderate_subs-join@example.com",
+        "last_post_at": null, "leave_address": "moderate_subs-leave@example.com",
+        "list_name": "moderate_subs", "mail_host": "example.com", "next_digest_number":
+        1, "no_reply_address": "noreply@example.com", "owner_address": "moderate_subs-owner@example.com",
+        "post_id": 1, "posting_address": "moderate_subs@example.com", "posting_pipeline":
+        "default-posting-pipeline", "reply_goes_to_list": "no_munging", "reply_to_address":
+        "", "request_address": "moderate_subs-request@example.com", "scheme": "http",
+        "send_welcome_message": true, "subject_prefix": "[Moderate_subs] ", "subscription_policy":
+        "confirm", "volume": 1, "web_host": "example.com", "welcome_message_uri":
+        "mailman:///welcome.txt"}'}
+    headers:
+      content-length: ['1830']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: subscription_policy=moderate
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'PATCH'
+    uri: http://localhost:9001/3.0/lists/moderate_subs@example.com/config
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+- request:
+    body: email=test%40example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/users
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      content-type: [application/json; charset=UTF-8]
+      location: ['http://localhost:9001/3.0/users/15']
+    status: {code: 201, message: Created}
+- request:
+    body: email=fritz%40example.org
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/users/15/addresses
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      content-type: [application/json; charset=UTF-8]
+      location: ['http://localhost:9001/3.0/addresses/fritz@example.org']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/15
+  response:
+    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
+        "\"e760c1db5c21a12c6e8bf64b42d61f579417f2d9\"", "is_server_owner": false,
+        "password": "$6$rounds=604230$3TJsGBKJqausTP/q$Z/Q16Iso7lY2FPuU/csWFng7Sw7fJIKCnDCySHSPvAy.Klq8Lz8W2ZZNT.WLNgpvnshGlT0yH1pBDgBhdViRv0",
+        "self_link": "http://localhost:9001/3.0/users/15", "user_id": 15}'}
+    headers:
+      content-length: ['326']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/15/addresses
+  response:
+    body: {string: !!python/unicode '{"entries": [{"email": "fritz@example.org", "http_etag":
+        "\"f5e7dce17a939b6cd74400155bc8208939e35913\"", "original_email": "fritz@example.org",
+        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/fritz@example.org",
+        "user": "http://localhost:9001/3.0/users/15"}, {"email": "test@example.com",
+        "http_etag": "\"7e89118330bb8d4cfca6242e4023e3685cfe802f\"", "original_email":
+        "test@example.com", "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/test@example.com",
+        "user": "http://localhost:9001/3.0/users/15"}], "http_etag": "\"022eb06e8ccdd9d0317e80895bcf7fe7341666d6\"",
+        "start": 0, "total_size": 2}'}
+    headers:
+      content-length: ['676']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/addresses/fritz@example.org/verify
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/addresses/test@example.com/verify
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+- request:
+    body: email=test%40example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com/bans
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      content-type: [application/json; charset=UTF-8]
+      location: ['http://localhost:9001/3.0/lists/open_list.example.com/bans/test@example.com']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/test@example.com
+  response:
+    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
+        "\"e760c1db5c21a12c6e8bf64b42d61f579417f2d9\"", "is_server_owner": false,
+        "password": "$6$rounds=604230$3TJsGBKJqausTP/q$Z/Q16Iso7lY2FPuU/csWFng7Sw7fJIKCnDCySHSPvAy.Klq8Lz8W2ZZNT.WLNgpvnshGlT0yH1pBDgBhdViRv0",
+        "self_link": "http://localhost:9001/3.0/users/15", "user_id": 15}'}
+    headers:
+      content-length: ['326']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/15/addresses
+  response:
+    body: {string: !!python/unicode '{"entries": [{"email": "fritz@example.org", "http_etag":
+        "\"a9370f52a26a16b0ebe81930a718a7fc38e2862c\"", "original_email": "fritz@example.org",
+        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/fritz@example.org",
+        "user": "http://localhost:9001/3.0/users/15", "verified_on": "2005-08-01T07:49:23"},
+        {"email": "test@example.com", "http_etag": "\"1e53e43ce1505c75a5b2b206b6a12b7cc4260bfe\"",
+        "original_email": "test@example.com", "registered_on": "2005-08-01T07:49:23",
+        "self_link": "http://localhost:9001/3.0/addresses/test@example.com", "user":
+        "http://localhost:9001/3.0/users/15", "verified_on": "2005-08-01T07:49:23"}],
+        "http_etag": "\"b61b5c8675801f918c17a54afbe34d98eb45a9cb\"", "start": 0, "total_size":
+        2}'}
+    headers:
+      content-length: ['752']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Open_list", "fqdn_listname":
+        "open_list@example.com", "http_etag": "\"6726e101e1dd1de6043eee72f741d4c2479f4735\"",
+        "list_id": "open_list.example.com", "list_name": "open_list", "mail_host":
+        "example.com", "member_count": 0, "self_link": "http://localhost:9001/3.0/lists/open_list.example.com",
+        "volume": 1}'}
+    headers:
+      content-length: ['324']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com/roster/moderator
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: display_name=None&list_id=open_list.example.com&pre_confirmed=True&pre_verified=True&subscriber=test%40example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/members
+  response:
+    body: {string: !!python/unicode 'Membership is banned'}
+    headers:
+      content-length: ['20']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 400, message: Bad Request}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list@example.com/roster/member
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list@example.com/requests
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/test@example.com
+  response:
+    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
+        "\"e760c1db5c21a12c6e8bf64b42d61f579417f2d9\"", "is_server_owner": false,
+        "password": "$6$rounds=604230$3TJsGBKJqausTP/q$Z/Q16Iso7lY2FPuU/csWFng7Sw7fJIKCnDCySHSPvAy.Klq8Lz8W2ZZNT.WLNgpvnshGlT0yH1pBDgBhdViRv0",
+        "self_link": "http://localhost:9001/3.0/users/15", "user_id": 15}'}
+    headers:
+      content-length: ['326']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/15/addresses
+  response:
+    body: {string: !!python/unicode '{"entries": [{"email": "fritz@example.org", "http_etag":
+        "\"a9370f52a26a16b0ebe81930a718a7fc38e2862c\"", "original_email": "fritz@example.org",
+        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/fritz@example.org",
+        "user": "http://localhost:9001/3.0/users/15", "verified_on": "2005-08-01T07:49:23"},
+        {"email": "test@example.com", "http_etag": "\"1e53e43ce1505c75a5b2b206b6a12b7cc4260bfe\"",
+        "original_email": "test@example.com", "registered_on": "2005-08-01T07:49:23",
+        "self_link": "http://localhost:9001/3.0/addresses/test@example.com", "user":
+        "http://localhost:9001/3.0/users/15", "verified_on": "2005-08-01T07:49:23"}],
+        "http_etag": "\"b61b5c8675801f918c17a54afbe34d98eb45a9cb\"", "start": 0, "total_size":
+        2}'}
+    headers:
+      content-length: ['752']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Open_list", "fqdn_listname":
+        "open_list@example.com", "http_etag": "\"6726e101e1dd1de6043eee72f741d4c2479f4735\"",
+        "list_id": "open_list.example.com", "list_name": "open_list", "mail_host":
+        "example.com", "member_count": 0, "self_link": "http://localhost:9001/3.0/lists/open_list.example.com",
+        "volume": 1}'}
+    headers:
+      content-length: ['324']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com/roster/moderator
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com/member/test@example.com
+  response:
+    body: {string: !!python/unicode '{}'}
+    headers:
+      content-length: ['2']
+      content-type: [application/json; charset=UTF-8]
+      vary: [Accept]
+    status: {code: 404, message: Not Found}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list.example.com/member/fritz@example.org
+  response:
+    body: {string: !!python/unicode '{}'}
+    headers:
+      content-length: ['2']
+      content-type: [application/json; charset=UTF-8]
+      vary: [Accept]
+    status: {code: 404, message: Not Found}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list@example.com/config
+  response:
+    body: {string: !!python/unicode '{"acceptable_aliases": [], "admin_immed_notify":
+        true, "admin_notify_mchanges": false, "administrivia": true, "advertised":
+        true, "allow_list_posts": true, "anonymous_list": false, "archive_policy":
+        "public", "autorespond_owner": "none", "autorespond_postings": "none", "autorespond_requests":
+        "none", "autoresponse_grace_period": "90d", "autoresponse_owner_text": "",
+        "autoresponse_postings_text": "", "autoresponse_request_text": "", "bounces_address":
+        "open_list-bounces@example.com", "collapse_alternatives": true, "convert_html_to_plaintext":
+        false, "created_at": "2005-08-01T07:49:23", "default_member_action": "defer",
+        "default_nonmember_action": "hold", "description": "", "digest_last_sent_at":
+        null, "digest_send_periodic": true, "digest_size_threshold": 30.0, "digest_volume_frequency":
+        "monthly", "digests_enabled": true, "display_name": "Open_list", "filter_content":
+        false, "first_strip_reply_to": false, "fqdn_listname": "open_list@example.com",
+        "goodbye_message_uri": "", "http_etag": "\"f5522fcc64a0848ce01fcad0b5f9ee42b9c02bd3\"",
+        "include_rfc2369_headers": true, "join_address": "open_list-join@example.com",
+        "last_post_at": null, "leave_address": "open_list-leave@example.com", "list_name":
+        "open_list", "mail_host": "example.com", "next_digest_number": 1, "no_reply_address":
+        "noreply@example.com", "owner_address": "open_list-owner@example.com", "post_id":
+        1, "posting_address": "open_list@example.com", "posting_pipeline": "default-posting-pipeline",
+        "reply_goes_to_list": "no_munging", "reply_to_address": "", "request_address":
+        "open_list-request@example.com", "scheme": "http", "send_welcome_message":
+        true, "subject_prefix": "[Open_list] ", "subscription_policy": "open", "volume":
+        1, "web_host": "example.com", "welcome_message_uri": "mailman:///welcome.txt"}'}
+    headers:
+      content-length: ['1787']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/open_list@example.com/requests
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/moderate_subs@example.com/requests
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/domains
+  response:
+    body: {string: !!python/unicode '{"entries": [{"base_url": "http://example.com",
+        "description": null, "http_etag": "\"e736411818ff1815ca83575e0958c38c5188f0a4\"",
+        "mail_host": "example.com", "self_link": "http://localhost:9001/3.0/domains/example.com",
+        "url_host": "example.com"}], "http_etag": "\"c385b155f8da284bf78dbe075e20f58a30c893ab\"",
+        "start": 0, "total_size": 1}'}
+    headers:
+      content-length: ['338']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'DELETE'
+    uri: http://localhost:9001/3.0/domains/example.com
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users
+  response:
+    body: {string: !!python/unicode '{"entries": [{"created_on": "2005-08-01T07:49:23",
+        "http_etag": "\"e760c1db5c21a12c6e8bf64b42d61f579417f2d9\"", "is_server_owner":
+        false, "password": "$6$rounds=604230$3TJsGBKJqausTP/q$Z/Q16Iso7lY2FPuU/csWFng7Sw7fJIKCnDCySHSPvAy.Klq8Lz8W2ZZNT.WLNgpvnshGlT0yH1pBDgBhdViRv0",
+        "self_link": "http://localhost:9001/3.0/users/15", "user_id": 15}], "http_etag":
+        "\"4ac49180421edb87346cc7a2444765f42c2121be\"", "start": 0, "total_size":
+        1}'}
+    headers:
+      content-length: ['431']
+      content-type: [application/json; charset=UTF-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'DELETE'
+    uri: http://localhost:9001/3.0/users/15
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+version: 1
diff --git a/src/postorius/tests/mailman_api_tests/test_subscriptions.py b/src/postorius/tests/mailman_api_tests/test_subscriptions.py
index 71738be..424b8ee 100644
--- a/src/postorius/tests/mailman_api_tests/test_subscriptions.py
+++ b/src/postorius/tests/mailman_api_tests/test_subscriptions.py
@@ -100,6 +100,20 @@
                               args=('open_list.example.com', )))
         self.assertHasErrorMessage(response)
 
+    def test_banned_address(self):
+        # Impossible to register with a banned address
+        self.client.login(username='testuser', password='pwd')
+        self.open_list.bans.add('test@example.com')
+        response = self.client.post(
+            reverse('list_subscribe', args=('open_list.example.com', )),
+            {'email': 'test@example.com'})
+        self.assertEqual(len(self.open_list.members), 0)
+        self.assertEqual(len(self.open_list.requests), 0)
+        self.assertRedirects(
+            response, reverse('list_summary',
+                              args=('open_list.example.com', )))
+        self.assertHasErrorMessage(response)
+
     def test_subscribe_mod(self):
         # The subscription is held for approval.
         self.client.login(username='testuser', password='pwd')