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docs/dns.md
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@ -11,7 +11,7 @@ Below you can find a list of **recommended DNS records**. While some are mandato
## Reverse DNS of your IP
Make sure that the PTR record of your IP matches the FQDN hostname of your mailcow host: `mail.domain.tld`. This record is usually set at the provider you leased the IP (server) from.
Make sure that the PTR record of your IP matches the FQDN of your mailcow host: `${MAILCOW_HOSTNAME}` (= host.domain.tld). This record is usually set at the provider you leased the IP (server) from.
## The minimal DNS configuration
@ -28,13 +28,13 @@ autoconfig IN A 1.2.3.4
## DKIM, SPF and DMARC
In the example DNS zone file snippet below, a simple **SPF** TXT record is used to only allow THIS server (the MX) to send mail for your domain. Every other server is disallowed but able to ("`~all`"). Please refer to [SPF Project](http://www.openspf.org).
In the example DNS zone file snippet below, a simple **SPF** TXT record is used to only allow THIS server (the MX) to send mail for your domain. Every other server is disallowed but able to ("`~all`"). Please refer to [SPF Project](http://www.openspf.org) for further reading.
```
@ IN TXT "v=spf1 mx ~all"
```
It is highly recommended to create a **DKIM** TXT record in your mailcow UI and set the corresponding TXT record in your DNS records. Please refer to [OpenDKIM](http://www.opendkim.org).
It is highly recommended to create a **DKIM** TXT record in your mailcow UI and set the corresponding TXT record in your DNS records. Please refer to [OpenDKIM](http://www.opendkim.org) for further reading.
```
default._domainkey IN TXT "v=DKIM1; k=rsa; t=s; s=email; p=..."