Enhance mail configuration: add envelope support in Sieve, create SMTP and IMAP SRV records, update Dovecot settings, and implement Postfix startup script

terraform/k8sapps/resources/mail/dovecot.conf

@@ -30,8 +30,8 @@ namespace inbox {
     auto = subscribe
   }
 
-  mailbox Spam {
-    special_use = \Spam
+  mailbox Junk {
+    special_use = \Junk
     auto = create
     auto = subscribe
   }
@@ -136,6 +136,8 @@ service stats {
   }
 }
 
+auth_mechanisms = plain login
+
 service auth {
   inet_listener auth {
     port = 31000
@@ -230,3 +232,13 @@ metric mail_delivery {
 sieve_script default {
   path = /etc/dovecot/sieve/default.sieve
 }
+
+log_path = /dev/stdout
+info_log_path = /dev/stdout
+debug_log_path = /dev/stdout
+
+# Enable verbose logging
+# auth_verbose = yes
+# auth_debug = yes
+# auth_debug_passwords = yes
+# mail_debug = yes