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36 lines
2 KiB
Markdown
36 lines
2 KiB
Markdown
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# Mailserver Setup
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This docker container fires up a copy of docker-mailserver.
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* The services SMTP, IMAP, POP, etc are exposed to by tunneling traffic from a public facing VPS
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* Outbound mail is sent through Amazon SES
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* Optionally, inbound mail can be received through Amazon SES (via. S3 bucket) to allow it to be backup/primary MX if you need it.
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* Make sure to update bucket information in `s3-ingest.py`
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Steps:
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1. You'll need to update parameters in `.env` and `wireguard.conf` and `Caddyfile`
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2. Initially, comment out (from `docker-compose.yml` the two lines starting with ` - ./data/caddy/certificates`). We need to start it once without so that Caddy will fetch our certificates. Once that happens, uncomment those lines and restart.
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3. Setup Mailgun or SES for mail forwarding and enter relay config in `.env`. SES is pretty easy to work with and supports multiple sending domains with a single set of credentials.
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4. Optionally, setup a S3 bucket and configure SES to deliver inbound mail there and then update `s3-ingest.py` and uncomment the lines for mail ingestion from `docker-compose.yml`. This is handy if your VPS/ISP is blocking inbound mail ports.
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## Front-end Server Wireguard
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This wireguard configuration would be deployed to the public-facing VPS which will forward interesting traffic (25,465,587,993,995,80,443) through to our docker services.
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```
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[Interface]
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Address = 10.0.0.1/24 # Private IP for the VPS in the VPN network
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ListenPort = 51820 # Default WireGuard port
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PrivateKey = ##PRIVATE KEY FOR PUBLIC SERVER##
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# packet forwarding
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PreUp = sysctl -w net.ipv4.ip_forward=1
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# port forwarding (HTTP) // repeat for each port
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PreUp = iptables -t nat -A PREROUTING -i eth0 -p tcp -m multiport --dports 25,465,587,993,995,80,443 -j DNAT --to-destination 10.0.0.2
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PostDown = iptables -t nat -D PREROUTING -i eth0 -p tcp -m multiport --dports 25,465,587,993,995,80,443 -j DNAT --to-destination 10.0.0.2
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[Peer]
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PublicKey = ##PUBLIC KEY FOR PRIVATE SERVER##
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AllowedIPs = 10.0.0.2/32 # IP of the home server in VPN
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```
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