diff --git a/check.py b/check.py
index efcfa08..9cf0ce1 100755
--- a/check.py
+++ b/check.py
@@ -9,7 +9,6 @@ import warnings
 from datetime import date
 from email.mime.text import MIMEText
 from email.utils import formatdate, make_msgid
-from urllib.parse import urlparse, urlunparse
 
 import requests
 import yaml
@@ -71,7 +70,6 @@ not_here_list = [
     "Test Page for the Apache HTTP Server",
     "Site not found · GitHub Pages",
     "504: Gateway time-out",
-    "504 Gateway Time-out",
     "502 Bad Gateway",
     "This page doesn't exist (404)",
     "Coming soon",
@@ -90,8 +88,6 @@ not_here_list = [
     "looks like there's no page here",
     "404 page",
     "Database Error",
-    "You are not authorized to access this page",
-    "Attention Required! | Cloudflare",
 ]
 
 
@@ -106,25 +102,8 @@ def get_title(html: str) -> str:
     return m.group(1).strip() if m and m.group(1) else "no title"
 
 
-def normalize_url(url: str) -> str:
-    """
-    Normalize the URL by parsing and reconstructing to ensure uniformity.
-
-    This handles cases like differing schemes, casing in the domain
-    and trailing slashes.
-    """
-    # Parse the URL into components
-    parsed_url = urlparse(url)
-    # Normalize the domain to lowercase and remove any trailing dot
-    normalized_netloc = parsed_url.netloc.lower().rstrip(".")
-    # Reconstruct the URL with normalized components
-    return urlunparse(parsed_url._replace(netloc=normalized_netloc))
-
-
-def check_conference(name: str, src_url: str, year: int) -> tuple[bool, str]:
+def check_conference(name: str, url: str) -> tuple[bool, str]:
     """Check if conference is live."""
-    url = src_url.format(year=year)
-    past_url = src_url.format(year=year - 1)
     try:
         # SotM Baltics has an invalid TLS certificate, but we don't care
         r = s.get(url, verify=False)
@@ -132,19 +111,6 @@ def check_conference(name: str, src_url: str, year: int) -> tuple[bool, str]:
         return (False, "connection refused")
 
     not_here = find_not_here_message(r.text)
-    if (
-        len(r.text) < 2048
-        and 'http-equiv="refresh"' in r.text
-        and str(year) not in r.text
-    ):
-        return (False, "redirect to URL without year")
-
-    if str(year) not in r.url:
-        return (False, "redirect to URL without year")
-
-    if normalize_url(r.url) == normalize_url(past_url):
-        return (False, "redirect to previous year")
-
     return (False, not_here) if not_here else (True, get_title(r.text))
 
 
@@ -174,8 +140,7 @@ def send_mail(subject: str, body: str) -> None:
 def check_conference_web_site(name: str, src_url: str, year: int) -> bool:
     """Check if an individual web site is live."""
     assert "{year}" in src_url
-    live, msg = check_conference(name, src_url, year)
-    url = src_url.format(year=year)
+    live, msg = check_conference(name, url := src_url.format(year=year))
     if live:
         body = f"{name}\n{url}\nWeb page title: {msg}"
         send_mail(f"Conference site live: {name} - {year}", body)
diff --git a/conference/__init__.py b/conference/__init__.py
index 415e3d2..6891012 100644
--- a/conference/__init__.py
+++ b/conference/__init__.py
@@ -6,9 +6,6 @@ import typing
 from datetime import date
 
 import yaml
-from dotenv import load_dotenv
-
-load_dotenv()
 
 config_file_path = os.path.expanduser(
     os.path.join(