from https://blog.raphaelpiccolo.com/fr/post/show/852
complete mail server with docker
the host hosting the mail server is mail.raphaelpiccolo.com
the domain is the part after the @. it means that emails will be sendable to *@raphaelpiccolo.com compose
create this docker-compose.yml file :
mail: image: tvial/docker-mailserver:stable restart: always container_name: mail ports: # smtp (accept starttls) for transfer
- “25:25” # esmtp (accept starttls) for submission
- “587:587” # esmtp (forced encryption) for submission # - “465:465” # imap4 (accept starttls) for retrieval
- “143:143” # imap4 (forced encryption) for retrieval
- “993:993” # pop3 (accept starttls) for retrieval # - “110:110” # pop3 (forced encryption) for retrieval # - “995:995” cap_add:
- NET_ADMIN
- SYS_PTRACE hostname: mail.raphaelpiccolo.com domainname: raphaelpiccolo.com volumes:
- ./mail/maildata:/var/mail
- ./mail/mailstate:/var/mail-state
- ./mail/maillogs:/var/log/mail
- ./mail/config/:/tmp/docker-mailserver/
- ./traefik/acme.json:/etc/letsencrypt/acme.json:ro environment:
- “SSL_TYPE=letsencrypt”
- “SPOOF_PROTECTION=1”
only useful to generate the https certificate used in mailserver
mailssl: image: containous/whoami container_name: mailssl labels:
-
traefik.enable=true
-
traefik.http.routers.mail.rule=Host(
mail.raphaelpiccolo.com) -
traefik.http.services.mail.loadbalancer.server.port=143
-
traefik.http.routers.mail.tls.certresolver=le
-
traefik.http.routers.mail.entrypoints=websecure
-
traefik.http.routers.mail.middlewares=securityheaders
webmail: image: hardware/rainloop restart: always container_name: webmail depends_on:
-
mail volumes:
-
./webmail:/rainloop/data environment:
-
LOG_TO_STDOUT=true labels:
-
traefik.enable=true
-
traefik.http.routers.webmail.rule=Host(
webmail.raphaelpiccolo.com) -
traefik.http.routers.webmail.tls.certresolver=le
-
traefik.http.routers.webmail.entrypoints=websecure
-
traefik.http.routers.webmail.middlewares=securityheaders
get the setup script
curl -o setup.sh https://raw.githubusercontent.com/tomav/docker-mailserver/master/setup.sh; chmod a+x ./setup.sh
check the dns of your domain :
the A record tells what is the ip of the server
IN A X.X.X.X mail IN A X.X.X.X
the mx record tells which server to call when you need to send emails ending like this @raphaelpiccolo.com
they will call port 25 on this server
IN MX 10 mail.raphaelpiccolo.com.
create an email account
execute this command
bash setup.sh email add contact@raphaelpiccolo.com xxx
it will create a line in the file
emacs config/postfix-accounts.cf contact@raphaelpiccolo.com|xxxxxxxxxx
catchall address:
now every mails sent to *@raphaelpiccolo.com will be redirected to contact@raphaelpiccolo.com
emacs config/postfix-virtual.cf
@raphaelpiccolo.com contact@raphaelpiccolo.com
test working
to test that local smtp is working and that the mailserver delivers the mails to the mailbox :
docker-compose up -d —force-recreate mail
swaks -t contact@raphaelpiccolo.com -f contact@raphaelpiccolo.com —header “Subject: foo”
will show this for success
← 250 2.0.0 Ok: queued as EEF106F804EE
you can see the delivered mail in maildata/raphaelpiccolo.com/contact/new
you can download this mail from your phone or from a webmail. do not send directly our mails to spam :)
DKIM to sign the message
run this to create keys
bash setup.sh config dkim
it will create this file containing what you should add in your dns
emacs ./config/opendkim/keys/raphaelpiccolo.com/mail.txt
then add this in dns
mail._domainkey IN TXT ( “v=DKIM1; h=sha256; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA8XOWBJea+/0q8FOnbdWx7micDDhXv5r4dYlF6fLnA8nOzm6OAUZpppD8nXZN5SbBU9UxVRJcmBe/cVUaXbgL9vo5TxcjYpEOpx5/1nd3GsgNsPm9Ur8DhOTBN0yKSRfbRNWJXSL273jP7j/9heQI3ah4KUOh3LIjT5xCGyd3vlZTZ2/Qio” “V0xC5zckkS7HNaH3Bi655fMvlXhULM79mvw2aJAG83JfPc4ybwAPthFTIMsxyQ9sAIiEpBP2+OHscL4H42ul0MoAxrNTUW468QD5RuruKA3z5IBBngwKu7EELJQduSoQV1XfZB7rQCOMjtFCs6jpHu9Izr2CyUgBBeewIDAQAB” )
the spf record tells which server are authorized to send emails
authorise all the servers listed in mx. ”~” means no problem if its another server consider switching to ”-” when everything works
IN TXT “v=spf1 mx ~all”
dmarc record uses dkim and spf for more quality
_dmarc IN TXT “v=DMARC1; p=none; rua=mailto:dmarc.report@raphaelpiccolo.com; ruf=mailto:dmarc.report@raphaelpiccolo.com; sp=none; ri=86400”
now you can restart and test
docker-compose up -d —force-recreate mail
rainloop
its a webmail, it connects to the server to retrieve emails. (you can also configure email reception directly on your phone)
use default password to first log
https://webmail.raphaelpiccolo.com/?admin admin 12345
then change password
then add a domain : raphaelpiccolo.com
imap: server : mail.raphaelpiccolo.com port: 143 security : starttls
smtp server : mail.raphaelpiccolo.com port: 587 security : starttls use authentification
the whitelist can stay empty
multiple domains
if you want to add a new domain to the existing server
configure mx on new.com to point to raphaelpiccolo.com
add a new account for the new domain :
bash setup.sh email add contact@new.com xxx
generate dkim agaim
add dkim + spf + dmarc in your dns
generate the ssl certificate : replace this line
traefik.http.routers.mail.rule=Host(mail.raphaelpiccolo.com)
with
traefik.http.routers.mail.rule=Host(mail.raphaelpiccolo.com, mail.new.com, )
Mail Queue Management
Mails von bestimmten Absendern aus der Queue löschen
for f in f; done
Mails requeuen
postsuper -r