Merge #1487

1487: Fix postfix queue permissions r=mergify[bot] a=ofthesun9

## What type of PR?
bug-fix (by anticipation of a potential change in base image)

## What does this PR do?
We need to check /queue permissions before starting postfix.
In case of postfix/postdrop uid/gid change, postfix would fail to start

### Related issue(s)
closes #1486 

## Prerequistes
- [x] In case of feature or enhancement: documentation updated accordingly


Co-authored-by: ofthesun9 <olivier@ofthesun.net>

core/postfix/start.py

@@ -64,4 +64,7 @@ if "RELAYUSER" in os.environ:
 # Run Podop and Postfix
 multiprocessing.Process(target=start_podop).start()
 os.system("/usr/libexec/postfix/post-install meta_directory=/etc/postfix create-missing")
+# Before starting postfix, we need to check permissions on /queue
+# in the event that postfix,postdrop id have changed
+os.system("postfix set-permissions")
 os.system("postfix start-fg")

towncrier/newsfragments/1486.bugfix

@@ -0,0 +1 @@
+Check postfix mailqueue permissions before start-up