Views:

First we need to "Enable the DKIM in Office 365"

When we "Click" to "Enable the DKIM", it will show you the below message

Copy the whole message and ADD in CNAME , just same as below table

We need to add the CNAME Record in DNS.

mpmct.com

Host name: selector1._domainkey

Points to address or value: selector1-mpmct-com._domainkey.mpmct.onmicrosoft.com

TTL: 3600

Host name: selector2._domainkey

Points to address or value: selector2-mpmct-com._domainkey.mpmct.onmicrosoft.com

TTL: 3600

gfsmct.com

Host name: selector1._domainkey

Points to address or value: selector1-gfsmct-com._domainkey.mpmct.onmicrosoft.com

TTL: 3600

Host name: selector2._domainkey

Points to address or value: selector2-gfsmct-com._domainkey.mpmct.onmicrosoft.com

TTL: 3600

After Adding the CNAME record in DNS Control panel . It will take 8 Hours to publish in the DNS .

Once it got Published you will able to Enable the DKIM.

Check the below Screenshot.

Next Steps is to ADD the DMARC TXT Record in the DNS Control Panel.

Please find how to create the DMARC TXT Record.

TXT record


domain: _dmarc.gutech.edu.om


TXT value: v=DMARC1; p=none; rua=mailto:user@domain.com; ruf=mailto:user@domain.com;

sp=none; ri=86400;


TTL 3600

Eg: _dmarc.contoso.com 3600 IN TXT "v=DMARC1; p=none"

_dmarc.contoso.com 3600 IN TXT "v=DMARC1; p=quarantine"

_dmarc.contoso.com 3600 IN TXT "v=DMARC1; p=reject"

Once this record is published. You can use these reports to authenticate all of your email if you have published p=none so that you can eventually move to p=reject.

https://blogs.technet.microsoft.com/fasttracktips/2016/07/16/spf-dkim-dmarc-and-exchange-online/