os.path.exists

Signed-off-by: René Jochum <rene@jochum.dev>

Readme.md

@@ -12,6 +12,7 @@ ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO postfix;
 
 ## Environment variables
 
+- DOVECOT_HOST - if not given it will be `dovecot`
 - MYDOMAIN
 - SUBNET
 - RELAYNETS

start.py

@@ -25,7 +25,8 @@ if "MESSAGE_SIZE_LIMIT" not in os.environ:
 if "DOVECOT_HOST" not in os.environ:
     os.environ['DOVECOT_HOST'] = 'dovecot'
 
-os.mkdir('/etc/postfix/sql')
+if not os.path.exists('/etc/postfix/sql'):
+    os.mkdir('/etc/postfix/sql')
 
 for postfix_file in glob.glob("/conf/*.cf", recursive=True):
     destination = os.path.join("/etc/postfix", os.path.basename(postfix_file))