Merge pull request #240 from mattronix/patch-2

Update prerequisite-dns.md
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André Peters 2020-10-29 11:24:59 +01:00 committet von GitHub
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@ -99,5 +99,32 @@ It is worth mentioning, that the following suggestions are not a comprehensive l
**NOTE:** The services may provide you with a TXT record, which you would insert into your DNS records as the provider specifies. This record will give you details about spam-classified mails by your domain. However, please ensure to read the providers documentation from the service you choose, as this process may vary and not all providers may use a TXT record.
### Email Test for SPF, DKIM and DMARC:
To test send an email to the email below and wait for a reply:
check-auth@verifier.port25.com
You will get a report back that looks like the following:
```
==========================================================
Summary of Results
==========================================================
SPF check: pass
"iprev" check: pass
DKIM check: pass
DKIM check: pass
SpamAssassin check: ham
==========================================================
Details:
==========================================================
....
```
The full report will contain more technical details this is just the first section, we found this to be quite usful for testing both outgoing mail and spam scores.
### Fully Qualified Domain Name (FQDN)
[^1]: A **Fully Qualified Domain Name** (**FQDN**) is the complete (absolute) domain name for a specific computer or host, on the Internet. The FQDN consists of at least three parts divided by a dot: the hostname (myhost), the domain name (mydomain) and the top level domain in short **tld** (com). In the example of `mx.mailcow.email` the hostname would be `mx`, the domain name `mailcow` and the tld `email`.