可能性へのプラグイン
WordPress.com のすべての有料プランで利用可能な何千ものプラグインを使って、新しい機能を追加したり、お気に入りのツールを接続したりできます。
dkim
6 プラグイン
Deliverability – pass DKIM, SPF, DMARC & moreCheck and improve your Email Deliverability. Pass DMARC by DKIM-signing your emails without an external SMTP. Comply with Google & Yahoo requirements!
Email Auth - DKIM, SPF, DMARC, Bounce Address, From AddressEnable email authentication/validation for the default WordPress PHPMailer.
Email EssentialsA plugin to make WordPress outgoing emails better and less likely to be marked as spam.
MailsureTest email sending, SPF, DKIM & DMARC
SignEmail SMTP & DNS DiagnosticStop WordPress emails from going to spam. Send emails via SMTP and check SPF, DKIM, DMARC records to improve email deliverability.
M Media Email Deliverability InspectorComprehensive email deliverability diagnostics tool - checks SPF, DKIM, DMARC, PTR, MX records, and SMTP configuration.