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@ -293,6 +293,28 @@ Just access the page and send an email to the address they give you:
echo "This is the body of the email" | mail -s "This is the subject line" test-iimosa79z@srv1.mail-tester.com
```
You can also c**heck your email configuration** sending an email to `check-auth@verifier.port25.com` and **reading the response** \(for this you will need to **open** port **25** and see the response in the file _/var/mail/root_ if you send the email a as root\).
Check that you pass all the tests:
```bash
==========================================================
Summary of Results
==========================================================
SPF check: pass
DomainKeys check: neutral
DKIM check: pass
Sender-ID check: pass
SpamAssassin check: ham
```
Alternatively, you can send a **message to a Gmail address that you control**, **view** the received **email’s headers** in your Gmail inbox, `dkim=pass` should be present in the `Authentication-Results` header field.
```text
Authentication-Results: mx.google.com;
spf=pass (google.com: domain of contact@example.com designates --- as permitted sender) smtp.mail=contact@example.com;
dkim=pass header.i=@example.com;
```
### ​Removing from Spamhouse Blacklist
The page www.mail-tester.com can indicate you if you your domain is being blocked by spamhouse. You can request your domain/IP to be removed at: ​[https://www.spamhaus.org/lookup/](https://www.spamhaus.org/lookup/)