diff --git a/.gitignore b/.gitignore
index d8f583f..c8c17a6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -142,4 +142,6 @@ scratch.py
 
 parsedmarc/resources/maps/base_reverse_dns.csv
 parsedmarc/resources/maps/unknown_base_reverse_dns.csv
+parsedmarc/resources/maps/sus_domains.csv
+parsedmarc/resources/maps/unknown_domains.txt
 *.bak
diff --git a/.vscode/launch.json b/.vscode/launch.json
index f2531e8..1a84b4e 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -11,6 +11,22 @@
       "program": "${file}",
       "console": "integratedTerminal"
     },
+    {
+      "name": "sample.eml",
+      "type": "debugpy",
+      "request": "launch",
+      "module": "parsedmarc.cli",
+      "args": ["samples/private/sample.eml"]
+    },
+    {
+      "name": "find_sus_domains.py",
+      "type": "debugpy",
+      "request": "launch",
+      "program": "find_sus_domains.py",
+      "args": ["-i", "unknown_domains.txt", "-o", "sus_domains.csv"],
+      "cwd": "${workspaceFolder}/parsedmarc/resources/maps",
+      "console": "integratedTerminal"
+    },
     {
       "name": "sortlists.py",
       "type": "debugpy",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e6db7f..a3744e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+8.18.8
+------
+
+- Fix parsing emails with an uncompressed aggregate report attachment (Closes #607)
+- Add `--no-prettify-json` CLI option (PR #617)
+
 8.18.7
 ------
 
diff --git a/parsedmarc/__init__.py b/parsedmarc/__init__.py
index fe51925..8292976 100644
--- a/parsedmarc/__init__.py
+++ b/parsedmarc/__init__.py
@@ -1261,28 +1261,28 @@ def parse_report_email(
                 payload = b64decode(payload)
                 if payload.startswith(MAGIC_ZIP) or payload.startswith(MAGIC_GZIP):
                     payload = extract_report(payload)
-                    ns = nameservers
-                    if payload.startswith("{"):
-                        smtp_tls_report = parse_smtp_tls_report_json(payload)
-                        result = OrderedDict(
-                            [("report_type", "smtp_tls"), ("report", smtp_tls_report)]
-                        )
-                        return result
-                    aggregate_report = parse_aggregate_report_xml(
-                        payload,
-                        ip_db_path=ip_db_path,
-                        always_use_local_files=always_use_local_files,
-                        reverse_dns_map_path=reverse_dns_map_path,
-                        reverse_dns_map_url=reverse_dns_map_url,
-                        offline=offline,
-                        nameservers=ns,
-                        timeout=dns_timeout,
-                        keep_alive=keep_alive,
-                    )
+                ns = nameservers
+                if payload.startswith("{"):
+                    smtp_tls_report = parse_smtp_tls_report_json(payload)
                     result = OrderedDict(
-                        [("report_type", "aggregate"), ("report", aggregate_report)]
+                        [("report_type", "smtp_tls"), ("report", smtp_tls_report)]
                     )
                     return result
+                aggregate_report = parse_aggregate_report_xml(
+                    payload,
+                    ip_db_path=ip_db_path,
+                    always_use_local_files=always_use_local_files,
+                    reverse_dns_map_path=reverse_dns_map_path,
+                    reverse_dns_map_url=reverse_dns_map_url,
+                    offline=offline,
+                    nameservers=ns,
+                    timeout=dns_timeout,
+                    keep_alive=keep_alive,
+                )
+                result = OrderedDict(
+                    [("report_type", "aggregate"), ("report", aggregate_report)]
+                )
+                return result
 
             except (TypeError, ValueError, binascii.Error):
                 pass
diff --git a/parsedmarc/cli.py b/parsedmarc/cli.py
index cdc7684..e2ab976 100644
--- a/parsedmarc/cli.py
+++ b/parsedmarc/cli.py
@@ -103,7 +103,9 @@ def _main():
 
     def process_reports(reports_):
         indent_value = 2 if opts.prettify_json else None
-        output_str = "{0}\n".format(json.dumps(reports_, ensure_ascii=False, indent=indent_value))
+        output_str = "{0}\n".format(
+            json.dumps(reports_, ensure_ascii=False, indent=indent_value)
+        )
 
         if not opts.silent:
             print(output_str)
@@ -483,7 +485,7 @@ def _main():
         "--no-prettify-json",
         action="store_false",
         dest="prettify_json",
-        help="output JSON in a single line without indentation"
+        help="output JSON in a single line without indentation",
     )
     arg_parser.add_argument("-v", "--version", action="version", version=__version__)
 
@@ -625,7 +627,7 @@ def _main():
         webhook_aggregate_url=None,
         webhook_forensic_url=None,
         webhook_smtp_tls_url=None,
-        webhook_timeout=60
+        webhook_timeout=60,
     )
     args = arg_parser.parse_args()
 
diff --git a/parsedmarc/constants.py b/parsedmarc/constants.py
index 3501402..23d4ca0 100644
--- a/parsedmarc/constants.py
+++ b/parsedmarc/constants.py
@@ -1,2 +1,2 @@
-__version__ = "8.18.7"
+__version__ = "8.18.8"
 USER_AGENT = f"parsedmarc/{__version__}"