Multiple DKIM Signatures

  • Resolved scottking

    (@scottking)


    3 years, 9 months ago

    I run an eCommerce store and use 2 SMTP services for sending emails from my domain; Rackspace SMTP for personal emails (like from Outlook on my desktop), and Elastic Mail SMTP for bulk and transactional emails from the store (like receipts).

    To make this work, my DNS configuration has 2 distinct DKIM records; one for each service.

    When sending emails from the plugin through Elastic Mail SMTP – even with the built in tester – the receiving end sees 2 DKIM signatures and this damages my spam score. https://snipboard.io/ecKSkt.jpg

    Where is the problem? Is this plug-in adding the signatures or is it the SMTP service?

    Thanks for your help!

Viewing 3 replies - 1 through 3 (of 3 total)
  • Thread Starter scottking

    (@scottking)

    Adding clarity from Rackspace:

    “Having multiple DKIM records shouldn’t be an issue. In fact, it’s a basic expectation where you send from more than one place. The issue here would be if you’re signing both from where you’re sending rather than one signature at a time, and that’s what I’m seeing in [your screen cap].

    “You should have one signature for each platform you send from, so it’s some sort of misconfiguration causing multiple signatures to reflect in one message.”

    Hi @scottking,

    Thanks for reaching out. Yes, one domain can have multiple DKIM records. You’ll probably need to merge them into one record. The records are not added by the plugin but by the email service provider you’re using like Elastic Mail.

    I hope this helps!

    Hi @scottking,

    Just an update on the issue. You can’t merge two DKIM records, it’s totally fine to use two DKIM records. However, the sent email message should only contain one DKIM signature. One is added by the SMTP server you’re configuring (Elastic Mail) in WP Mail SMTP, another one is probably added somewhere in your site maybe by some other plugins. You might need to identify what is adding the DKIM records manually on your site. This troubleshooting guide might help to figure that out.

    I hope this helps!

Viewing 3 replies - 1 through 3 (of 3 total)
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