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begin to write a small guide on how to set up a mail server

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Robin Raymond 2017-11-10 16:57:11 +01:00
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README.md
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@ -102,6 +102,40 @@ openssl s_client -host mail.example.com -port 143 -starttls imap
```
## How to Set Up a 10/10 Mail Server
Mail servers can be a tricky thing to set up. This guide is supposed to run you
through the most important steps to achieve a 10/10 score on `mail-tester.com`.
### Fully Qualified Domain Name
No matter how many domains you want to serve on your mail server, you need to
settle on a _Fully Qualified Domain Name_ (FQDN) where your server is reachable,
so that other servers can find yours. Common FQDN include `mx.example.com`
(where `example.com` is a domain you own) or `mail.example.com`.
After you settled on a FQDN (we will assume `mx.example.com` henceforth) you
need to
* Set a DNS entry on your domain to point to the IP of the server. For this
add a DNS record such as
| Name (Subdomain) | TTL | Type | Priority | Value |
| ---------------- | ----- | ---- | -------- | ----------------- |
| mx.example.com | 10800 | A | | `xxx.xxx.xxx.xxx` |
to your domain, where `xxx.xxx.xxx.xxx` is the IP of your server.
* Set a `rDNS` (reverse DNS) entry for your FQDN. You need to do so wherever
you have rented your server. Make sure that `xxx.xxx.xxx.xxx` resolves to
`mx.example.com`.
### Spf record
TODO
### DKIM signature
TODO
## A Complete Mail Server Without Moving Parts
### Used Technologies