To authorize Jira Cloud to send emails on your behalf you will have to add them to your SPF record. The SPF record mechanism used by Jira Cloud is shown below.
To enable DKIM signing for your domain please add the following two CNAME records in your DNS.
s1._domainkey IN CNAME s1._domainkey.atlassian.net.
s2._domainkey IN CNAME s2._domainkey.atlassian.net.
Finally, to verify your SPF and DKIM configuration you can use their tool by following the this link.
For more information on setting up SPF and DKIM for Jira CLoud please click on the button below.
Create a free OnDMARC account to test your configuration.