Postfix docker

https://www.cyberciti.biz/faq/how-to-configure-postfix-relayhost-smarthost-to-send-email-using-an-external-smptd/

https://hub.docker.com/r/boky/postfix/

https://github.com/jeremybusk/docker-postfix

https://help.ubuntu.com/community/PostfixCompleteVirtualMailSystemHowto

https://wiki.debian.org/opendkim

https://www.linuxbabe.com/mail-server/setting-up-dkim-and-spf

Alternatives

https://github.com/mail-in-a-box/mailinabox

https://github.com/eldada/postfix-relay-kubernetes

https://github.com/catatnight/docker-postfix

https://github.com/juanluisbaptiste/docker-postfix best?

https://github.com/jessfraz/dockerfiles/tree/master/postfix

https://github.com/noteed/docker-postfix/blob/master/Dockerfile

https://github.com/alterrebe/docker-mail-relay

https://upcloud.com/resources/tutorials/secure-postfix-using-lets-encrypt

https://ubuntu.com/server/docs/mail-postfix#:~:text=SMTP%20Authentication

https://help.ubuntu.com/community/PostfixDovecotSASL

https://wiki.debian.org/PostfixAndSASL

https://github.com/humpedli/docker-postfix-dovecot

https://doc.dovecot.org/configuration_manual/authentication/password_schemes/

https://doc.dovecot.org/configuration_manual/howto/postfix_and_dovecot_sasl/

https://neoserver.site/help/step-step-installation-instructions-postfix-and-dovecot-ubuntu

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/sect-security_guide-securing_postfix-configuring_postfix_to_use_sasl

https://www.linode.com/docs/guides/postfix-smtp-debian7/

Short

• https://documentation.wazuh.com/current/user-manual/manager/manual-email-report/smtp-authentication.html

passwd encryption

• https://superuser.com/questions/1395665/is-there-a-way-to-encrypt-mail-password-when-configuring-mail-notifications-usin
• https://cyrus-sasl.andrew.cmu.narkive.com/nkR0CFqv/etc-sasldb2-and-plaintext-passwords

DKIM

• https://tecadmin.net/setup-dkim-with-postfix-on-ubuntu-debian/
• https://ubuntu.tutorials24x7.com/blog/set-up-dkim-domainkeys-with-postfix-on-ubuntu-20-04-lts
• https://github.com/dodancs/DKIM-auto-signing
• https://github.com/captbrando/dkimrotator/blob/master/dkimrotate.sh

More

• https://github.com/HillLiu/docker-postfix-sasl-dkim/blob/master/docker/entrypoint.sh

https://github.com/catatnight/docker-postfix/blob/master/assets/install.sh