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.
As an example, here is an SPF record which authorizes only Office 365 to send emails,:
v=spf1 include:spf.protection.outlook.com ~all
After adding Jira, it should look like this:
v=spf1 include:spf.protection.outlook.com include:_spf.atlassian.net ~all
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.
For more information on setting up SPF and DKIM for Jira CLoud please click on the button below.
Finally, to verify your SPF and DKIM configuration is correct you can use their tool by following this link.
Create a free OnDMARC account to test your configuration.