The DKIM-Signature has expired on the message and will result in a DKIM FAILURE result at all inboxes.
This expiration tag ("x" tag) is found in the DKIM-Signature headers of outbound messages. This tag contains a specified timestamp for the date when this DKIM key should be treated as revoked by mail servers.
Some senders actively use expiration tags as a way to manage/cycle through new DKIM keys as an additional way lessen the risk of malicious actors from possibly gaining access to a DKIM key to fool message recipients into opening malicious messages.
Your Email Deliverability is in Jeopardy!
Blacklisting is a sign that you are not actively managing your email deliverability. Other technologies - SPF, DKIM and DMARC are now just as important to get your email placed in the Inbox of your recipients. If you aren’t managing email deliverability, your message may never be heard.
MxToolbox Delivery Center Features:
- Insight into your SPF, DKIM and DMARC configuration to ensure your sending email properly
- DMARC Compliance checks for all of your reported email
- Adaptive Blacklist Monitoring of all your email senders
- Recommendations for improving DMARC compliance and DMARC policies
- Event-based reminders for emergent issues and on-going maintenance
DMARC is a necessity for your business!
Learn More about Email Delivery