If you have a business domain email address based on a WordPress.com site, you can easily update your sender identity in your tinyAlbert account. Then, you can register a DKIM.
Click to understand the importance of a DKIM.
Signing up for a DKIM
Log in to your WordPress.com account.
Open the Manage Your DNS Records page.
Locate and click your purchased domain name.
Go to set up DNS records.
Click Add a record.
To add a CNAME record, enter the values you see below in those fields. Then click Add DNS record. While saving the record, you might see a warning message. Just click Yes.
Type: CNAME
Name (Host): tec1._domainkey
Alias Of (Points To): tec1.dkim.tinyemail.com
TTL: 3600
In this example, I manually enter tec1._domainkey. WordPress auto-fecthes the domain (e.g. .altcurrentpress.com).
Configuring the tinyAlbert account
Open tinyAlbert.
Click the account icon and select the DKIM menu tab.
Go to the Sender domain drop-down and choose your domain.
Click the Check link.
If DKIM is successfully set up, the status changes to DKIM verified. If you have a problem, contact our support team.
Setting up and verifying a DKIM record does not take much time, but it does yield great rewards. You're in compliance, and can rest easy that you've reduced the risk of getting tagged as a spammer.