Settings for external domains

Add the following DNS entries to your DNS zone if the domain was not registered via creoline DNS:

SPF record

To allow our infrastructure to send emails on behalf of your domain, the following DNS entry is required so that outgoing emails from the destination server are not classified as spam.

Property	Value
RR type	TXT
Host:	@
TTL:	3600

Value:

v=spf1 include:_spf.creoline.de -all

If an SPF record already exists for your DNS zone, please only add the include mechanism for _spf.creoline.de

DKIM entry

To sign outgoing e-mails using the DKIM procedure, the following DNS entry is required:

Property	Value
RR-Type	TXT
host:	creoline._domainkey
TTL:	3600

Value:

v=DKIM1; h=sha256; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDR0NpA0A91JTIFCBSzmrQU6T6adwC8IM5KE7jUjclB/H8ipI+/e7AabDmEQ3IM51IAVnZSD/KDh9v/7Y+RKu9XSiH/1lNL5HinWb3zncqeqOPx6eaoKSM1iA9YdsNvW9NOTEwZEM0e7sNjkNsMJMtmgGtrk3GUVSLnGA21k2hjfwIDAQAB

DMARC entry

To additionally activate the DMARC security feature, please add the following DNS entry

Property	Value
RR-Type	TXT
Host:	_dmarc
TTL:	3600

v=DMARC1; p=reject; rua=mailto:rua.dmarc@creolineserver.de; rf=afrf; adkim=r; aspf=r

The DMARC procedure may only be activated if SPF and DKIM have previously been activated.

Checking the set DNS entries

You can use our Dig-Tool to check the previously configured DNS entries.

Security feature	Test URL
SPF	https://help.creoline.com/tools/dig/TXT/creoline.cloud
DKIM	https://help.creoline.com/tools/dig/TXT/creoline._domainkey.creoline.cloud
DMARC	https://help.creoline.com/tools/dig/TXT/_dmarc.creoline.cloud

After all DNS entries have been configured and checked, we recommend that you also send a test e-mail via the website https://appmaildev.com/en/dkim to check all security features individually.