diff --git a/core/dovecot/start.py b/core/dovecot/start.py
index 2fdc7361..68043cd1 100755
--- a/core/dovecot/start.py
+++ b/core/dovecot/start.py
@@ -22,7 +22,10 @@ def start_podop():
 		("sieve", "url", "http://admin/internal/dovecot/§"),
     ])
 
-convert = lambda src, dst: open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
+def convert(src, dst):
+    logger = log.getLogger("convert()")
+    logger.debug("Source: %s, Destination: %s", src, dst)
+    open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
 
 @retry(
     stop=tenacity.stop_after_attempt(100),
diff --git a/core/nginx/config.py b/core/nginx/config.py
index 07b7ea32..719a6450 100755
--- a/core/nginx/config.py
+++ b/core/nginx/config.py
@@ -2,11 +2,18 @@
 
 import jinja2
 import os
-
-convert = lambda src, dst, args: open(dst, "w").write(jinja2.Template(open(src).read()).render(**args))
+import logging as log
+import sys
 
 args = os.environ.copy()
 
+log.basicConfig(stream=sys.stderr, level=args["LOG_LEVEL"] if "LOG_LEVEL" in args else "WARN")
+
+def convert(src, dst, args):
+    logger = log.getLogger("convert()")
+    logger.debug("Source: %s, Destination: %s", src, dst)
+    open(dst, "w").write(jinja2.Template(open(src).read()).render(**args))
+
 # Get the first DNS server
 with open("/etc/resolv.conf") as handle:
     content = handle.read().split()
diff --git a/core/postfix/start.py b/core/postfix/start.py
index c41a2f4c..3214e077 100755
--- a/core/postfix/start.py
+++ b/core/postfix/start.py
@@ -27,7 +27,10 @@ def start_podop():
         ("senderlogin", "url", "http://admin/internal/postfix/sender/login/§")
     ])
 
-convert = lambda src, dst: open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
+def convert(src, dst):
+    logger = log.getLogger("convert()")
+    logger.debug("Source: %s, Destination: %s", src, dst)
+    open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
 
 @retry(
     stop=tenacity.stop_after_attempt(100),
diff --git a/services/rspamd/start.py b/services/rspamd/start.py
index cc4efa85..8819407f 100755
--- a/services/rspamd/start.py
+++ b/services/rspamd/start.py
@@ -12,7 +12,10 @@ from tenacity import retry
 
 log.basicConfig(stream=sys.stderr, level=os.environ["LOG_LEVEL"] if "LOG_LEVEL" in os.environ else "WARN")
 
-convert = lambda src, dst: open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
+def convert(src, dst):
+    logger = log.getLogger("convert()")
+    logger.debug("Source: %s, Destination: %s", src, dst)
+    open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
 
 @retry(
     stop=tenacity.stop_after_attempt(100),
diff --git a/services/unbound/start.py b/services/unbound/start.py
index 6f494762..198934c6 100755
--- a/services/unbound/start.py
+++ b/services/unbound/start.py
@@ -2,8 +2,16 @@
 
 import jinja2
 import os
+import logging as log
+import sys
+
+log.basicConfig(stream=sys.stderr, level=os.environ["LOG_LEVEL"] if "LOG_LEVEL" in os.environ else "WARN")
+
+def convert(src, dst):
+    logger = log.getLogger("convert()")
+    logger.debug("Source: %s, Destination: %s", src, dst)
+    open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
 
-convert = lambda src, dst: open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
 convert("/unbound.conf", "/etc/unbound/unbound.conf")
 
 os.execv("/usr/sbin/unbound", ["-c /etc/unbound/unbound.conf"])
diff --git a/webmails/rainloop/start.py b/webmails/rainloop/start.py
index 4c116e09..3b4ac3da 100755
--- a/webmails/rainloop/start.py
+++ b/webmails/rainloop/start.py
@@ -3,8 +3,15 @@
 import jinja2
 import os
 import shutil
+import logging as log
+import sys
 
-convert = lambda src, dst: open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
+log.basicConfig(stream=sys.stderr, level=os.environ["LOG_LEVEL"] if "LOG_LEVEL" in os.environ else "WARN")
+
+def convert(src, dst):
+    logger = log.getLogger("convert()")
+    logger.debug("Source: %s, Destination: %s", src, dst)
+    open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
 
 # Actual startup script
 os.environ["FRONT_ADDRESS"] = os.environ.get("FRONT_ADDRESS", "front")
diff --git a/webmails/roundcube/start.py b/webmails/roundcube/start.py
index 3a0bd0bc..ccb5faf5 100755
--- a/webmails/roundcube/start.py
+++ b/webmails/roundcube/start.py
@@ -2,8 +2,15 @@
 
 import os
 import jinja2
+import logging as log
+import sys
 
-convert = lambda src, dst: open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
+log.basicConfig(stream=sys.stderr, level=os.environ["LOG_LEVEL"] if "LOG_LEVEL" in os.environ else "WARN")
+
+def convert(src, dst):
+    logger = log.getLogger("convert()")
+    logger.debug("Source: %s, Destination: %s", src, dst)
+    open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
 
 os.environ["MAX_FILESIZE"] = str(int(int(os.environ.get("MESSAGE_SIZE_LIMIT"))*0.66/1048576))
 
@@ -14,4 +21,4 @@ os.system("mkdir -p /data/gpg")
 os.system("chown -R www-data:www-data /data")
 
 # Run apache
-os.execv("/usr/local/bin/apache2-foreground", ["apache2-foreground"])
\ No newline at end of file
+os.execv("/usr/local/bin/apache2-foreground", ["apache2-foreground"])