diff --git a/core/admin/mailu/configuration.py b/core/admin/mailu/configuration.py
index 228bb253..47ede0e9 100644
--- a/core/admin/mailu/configuration.py
+++ b/core/admin/mailu/configuration.py
@@ -25,6 +25,7 @@ DEFAULT_CONFIG = {
     'DB_PW': None,
     'DB_HOST': 'database',
     'DB_NAME': 'mailu',
+    'DB_APPENDIX': '',
     'SQLITE_DATABASE_FILE': 'data/main.db',
     'SQLALCHEMY_DATABASE_URI': 'sqlite:////data/main.db',
     'SQLALCHEMY_DATABASE_URI_ROUNDCUBE': 'sqlite:////data/roundcube.db',
@@ -102,8 +103,8 @@ class ConfigManager:
 
     DB_TEMPLATES = {
         'sqlite': 'sqlite:////{SQLITE_DATABASE_FILE}',
-        'postgresql': 'postgresql://{DB_USER}:{DB_PW}@{DB_HOST}/{DB_NAME}',
-        'mysql': 'mysql+mysqlconnector://{DB_USER}:{DB_PW}@{DB_HOST}/{DB_NAME}',
+        'postgresql': 'postgresql://{DB_USER}:{DB_PW}@{DB_HOST}/{DB_NAME}{DB_APPENDIX}',
+        'mysql': 'mysql+mysqlconnector://{DB_USER}:{DB_PW}@{DB_HOST}/{DB_NAME}{DB_APPENDIX}',
     }
 
     def __init__(self):
diff --git a/core/base/requirements-dev.txt b/core/base/requirements-dev.txt
index 3d2495fb..9b27a124 100644
--- a/core/base/requirements-dev.txt
+++ b/core/base/requirements-dev.txt
@@ -46,6 +46,7 @@ watchdog
 
 # core/postfix
 postfix-mta-sts-resolver
+uvloop
 
 # core/oletools
 python-magic
@@ -56,4 +57,3 @@ requests
 
 # optional/radicale
 radicale
-
diff --git a/core/base/requirements-prod.txt b/core/base/requirements-prod.txt
index 40b97bc4..81f32289 100644
--- a/core/base/requirements-prod.txt
+++ b/core/base/requirements-prod.txt
@@ -78,6 +78,7 @@ tabulate==0.9.0
 tenacity==8.2.3
 typing_extensions==4.11.0
 urllib3==2.2.1
+uvloop==0.21.0
 validators==0.28.1
 visitor==0.1.3
 vobject==0.9.7
diff --git a/docs/faq.rst b/docs/faq.rst
index 423cfc80..e2cc7c5b 100644
--- a/docs/faq.rst
+++ b/docs/faq.rst
@@ -992,6 +992,7 @@ Admin container fails to connect to external MariaDB database
 `````````````````````````````````````````````````````````````
 
 If the admin container is `unable to connect to an external MariaDB database due to incompatible collation`_, you may need to change the ``SQLALCHEMY_DATABASE_URI`` setting to ensure the right connector is used.
+Alternatively, you may set ``DB_APPENDIX`` accordingly. For example: ``?collation=utf8mb4_unicode_ci`` is appended as is just after the database name in case DB_TYPE and related values are set.
 
 MariaDB has no support for utf8mb4_0900_ai_ci which is the new default since MySQL version 8.0.
 
diff --git a/towncrier/newsfragments/3729.misc b/towncrier/newsfragments/3729.misc
new file mode 100644
index 00000000..492d4998
--- /dev/null
+++ b/towncrier/newsfragments/3729.misc
@@ -0,0 +1 @@
+Add optional DB_APPENDIX configuration parameter which is appended as is to the postgresql or mysql URI
\ No newline at end of file