hotfix for dovecot namespace on ubuntu 18.04

install/ubuntu/18.04/dovecot/conf.d/10-mail.conf

@@ -2,3 +2,8 @@ mail_privileged_group = mail
 mail_access_groups = mail
 mail_location = maildir:%h/mail/%d/%n
 pop3_uidl_format = %08Xu%08Xv
+namespace inbox {
+  inbox = yes
+}
+first_valid_uid = 1000
+mbox_write_locks = fcntl

install/ubuntu/18.04/dovecot/dovecot.conf

@@ -2,23 +2,3 @@ protocols = imap pop3
 listen = *, ::
 base_dir = /var/run/dovecot/
 !include conf.d/*.conf
-
-namespace inbox {
-    type = private
-    separator = /
-    prefix =
-    inbox = yes
-
-    mailbox Sent {
-        auto = subscribe
-        special_use = \Sent
-    }
-    mailbox Drafts {
-        auto = subscribe
-        special_use = \Drafts
-    }
-    mailbox Trash {
-        auto = subscribe
-        special_use = \Trash
-    }
-}

install/vst-install-ubuntu.sh

@@ -1087,7 +1087,18 @@ fi
 
 if [ "$dovecot" = 'yes' ]; then
     gpasswd -a dovecot mail
-    cp -rf $vestacp/dovecot /etc/
+    if [[ ${release:0:2} -ge 18 ]]; then
+        cp -r /usr/local/vesta/install/debian/9/dovecot /etc/
+        if [ -z "$(grep yes /etc/dovecot/conf.d/10-mail.conf)" ]; then
+            echo "namespace inbox {" >> /etc/dovecot/conf.d/10-mail.conf
+            echo "  inbox = yes" >> /etc/dovecot/conf.d/10-mail.conf
+            echo "}" >> /etc/dovecot/conf.d/10-mail.conf
+            echo "first_valid_uid = 1000" >> /etc/dovecot/conf.d/10-mail.conf
+            echo "mbox_write_locks = fcntl" >> /etc/dovecot/conf.d/10-mail.conf
+        fi
+    else
+        cp -rf $vestacp/dovecot /etc/
+    fi
     cp -f $vestacp/logrotate/dovecot /etc/logrotate.d/
     chown -R root:root /etc/dovecot*
     update-rc.d dovecot defaults