Adding multiple domains

[PrieserMax]

Heyo,
I would like to add more domains.
How is that possible?
I can imagine, adding them to the .env file, expanding the SSL-certficate. But what is with Postfix?
I'm not that sure (like here: #1912 )
Thanks for the great work so far, this service is amazing and being able to use it with Bitwarden (Vaultwarden) is perfect!

Greetings
Max

[BJReplay]

I've just figured this out from another discussion / issue:

Caveats:

• Running with a wildcard certificate so didn't need to think about that - but if you've got automatic certificates then that will presumably be taken care of, otherwise you'll need to replace your certificate.
• Running with a modified version of simplelogin/postfix docker container (modified to deal with the fact that spamhaus blocks queries from recursive DNS servers, so I'm using DQN, and I modified docker to pull in the DQN key from config and update main.cf with this. You probably don't need to worry about this - just including for full disclosure.
• modified simplelogin/postfix docker container to accept and use RELAY_PORT. You probably don't need to worry about this - just including for full disclosure.

What I found worked for me:

• I had previously set up a custom domain in the UI, so I copied the three DKIM CNAME entries, the SPF TXT record and the DMARC TXT record for the custom domain to my new intended public domain DNS entries, as well as an MX record pointing back to my main simplelogin domain (so all in all, six DNS records for my new domain.
• I was adding two new domains, so did this (added six DNS entries) for my second domain.
• I added both new domains to OTHER_ALIAS_DOMAINS=["email.domain1.tld", "email.domain2.tld"] in my .env file
• I restarted all docker containers (docker compose down && docker compose up -d && docker compose exec sl-db psql -U postgres -d simplelogin)
• You might get away with restarting less containers, but restarting the stack makes sense, and I know it worked.
• select * from public_domain; confirmed both new domains were in and fully set up.

If you haven't previously set up custom domains, the DNS entries you'll need set up are:

Assuming setting up email.domain.tld

• CNAME dkim._domainkey.email dkim._domainkey.<your main simplelogin domain here>
• CNAME dkim02._domainkey.email dkim02._domainkey.<your main simplelogin domain here>
• CNAME dkim03._domainkey.email dkim03._domainkey.<your main simplelogin domain here>
• TXT email v=spf1 include:<your main simplelogin domain here>~all
• TXT _dmarc.email v=DMARC1; p=quarantine; pct=100; adkim=s; aspf=s (no customisation required)
• MX email <your main simplelogin domain here> 10 (default TTL is fine)

If just setting up domain.tld

• CNAME dkim._domainkey dkim._domainkey.<your main simplelogin domain here>
• CNAME dkim02._domainkey dkim02._domainkey.<your main simplelogin domain here>
• CNAME dkim03._domainkey dkim03._domainkey.<your main simplelogin domain here>
• TXT @ v=spf1 include:<your main simplelogin domain here>~all
• TXT _dmarc v=DMARC1; p=quarantine; pct=100; adkim=s; aspf=s (no customisation required)
• MX @ <your main simplelogin domain here> 10 (default TTL is fine)