diff --git a/README.md b/README.md
index a2ad5231..bfeea09a 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ Additional informations:
 
 - only config files, no *sql database required
 - mails are stored in `/var/mail/${domain}/${username}`
+- you should use a data volume container for `/var/mail` for data persistence
 - email login are full email address (`username1@my-domain.com`)
 - ssl is strongly recommended
 - user accounts are managed in `./postfix/accounts.cf`
@@ -33,7 +34,7 @@ Additional informations:
 
 ## run
 
-	docker run -v "$(pwd)/postfix":/tmp/postfix -v "$(pwd)/spamassassin":/tmp/spamassassin -p "25:25" -p "143:143" -p "587:587" -p "993:993" -e docker_mail_domain=my-domain.com -t tvial/docker-mailserver
+	docker run --name mail -v "$(pwd)/postfix":/tmp/postfix -v "$(pwd)/spamassassin":/tmp/spamassassin -p "25:25" -p "143:143" -p "587:587" -p "993:993" -h mail.my-domain.com -t tvial/docker-mailserver
 
 ## docker-compose template (recommended)
 
@@ -47,11 +48,9 @@ Additional informations:
 	  - "143:143"
 	  - "587:587"
 	  - "993:993"
-	  environment:
-	    docker_mail_domain: "my-domain.com"
 	  volumes:
-	  - ./spamassassin:/tmp/spamassassin/:ro
-	  - ./postfix:/tmp/postfix/:ro
+	  - ./spamassassin:/tmp/spamassassin/
+	  - ./postfix:/tmp/postfix/
 
 Volumes allow to:
 
diff --git a/postfix/accounts.cf b/postfix/accounts.cf
index 94896e0d..ecb0f063 100644
--- a/postfix/accounts.cf
+++ b/postfix/accounts.cf
@@ -1 +1 @@
-user@domain.tld|mypassword
\ No newline at end of file
+user@domain.tld|mypassword
diff --git a/start-mailserver.sh b/start-mailserver.sh
index 60e50ecd..dc64c045 100644
--- a/start-mailserver.sh
+++ b/start-mailserver.sh
@@ -1,23 +1,19 @@
 #!/bin/sh
 
 echo "Regenerating postfix 'vmailbox' and 'virtual' for given users"
-# rm /etc/postfix/virtual
-# rm /etc/postfix/virtual.db
-# rm /etc/postfix/vmailbox
-# rm /etc/postfix/vmailbox.db
 echo "# WARNING: this file is auto-generated. Modify accounts.cf in postfix directory on host" > /etc/postfix/vmailbox
+# Checking that /tmp/postfix/accounts.cf ends with a newline
+sed -i -e '$a\' /tmp/postfix/accounts.cf
 # Creating users
-while IFS=$'|' read -r login pass
+while IFS=$'|' read login pass
 do
-
   # Setting variables for better readability
   user=$(echo ${login} | cut -d @ -f1)
   domain=$(echo ${login} | cut -d @ -f2)
-
   # Let's go!
   echo "user '${user}' for domain '${domain}' with password '********'"
   echo "${login} ${domain}/${user}/" >> /etc/postfix/vmailbox
-  userdb ${login} set uid=5000 gid=5000 home=/var/mail/${domain}/${user} mail=/var/mail/${domain}/${user}
+  /usr/sbin/userdb ${login} set uid=5000 gid=5000 home=/var/mail/${domain}/${user} mail=/var/mail/${domain}/${user}
   echo "${pass}" | userdbpw -md5 | userdb ${login} set systempw
   echo "${pass}" | saslpasswd2 -p -c -u ${domain} ${login}
   mkdir -p /var/mail/${domain}
@@ -31,7 +27,7 @@ cp /tmp/postfix/virtual /etc/postfix/virtual
 echo "Postfix configurations"
 postmap /etc/postfix/vmailbox
 postmap /etc/postfix/virtual
-sed -i -r 's/DOCKER_MAIL_DOMAIN/'"$docker_mail_domain"'/g' /etc/postfix/main.cf
+sed -i -r 's/DOCKER_MAIL_DOMAIN/'"$(hostname -d)"'/g' /etc/postfix/main.cf
 cat /tmp/vhost.tmp | sort | uniq >> /etc/postfix/vhost && rm /tmp/vhost.tmp
 
 echo "Fixing permissions"
@@ -39,7 +35,7 @@ chown -R 5000:5000 /var/mail
 mkdir -p /var/log/clamav && chown -R clamav:root /var/log/clamav
 
 echo "Creating /etc/mailname"
-echo $docker_mail_domain > /etc/mailname
+echo $(hostname -d) > /etc/mailname
 
 echo "Configuring Spamassassin"
 echo "required_hits 5.0" >> /etc/mail/spamassassin/local.cf