Overview
After you configure DKIM for your Lyris LM site and attempt to send a mailing you get a warning and notice delays in email delivery if you bypass it.
Prerequisites
- You are an Administrator on your ListManager server
Solution
Use your Administrator account to check the following areas in your DKIM settings and make any necessary adjustments. For additional details on DKIM configuration see the How to configure DKIM / Domain Keys article.
Remove DomainKeys From Your Configuration
DomainKeys was depreciated in favor of DKIM (DomainKeys Identified Mail) which replaced it. If it is configured it may cause delays in sending mail.
- Navigate to Utilities > Administration > Sites > Edit Site, DKIM tab
- If DomainKeys signing enabled is set to "yes", change it to "no"
- If DomainKeys signing defaults to is set to "On", change it to "Off"
Ensure That the From Domain Matches Your DKIM Configuration
The From address of your mailing must use the same domain as your DKIM configuration.
- Navigate to Utilities > Administration > Sites
- Locate the Site you are configuring from the list and click the Advanced Configuration button on the site's row
- Note the list of Configured Domains and ensure that the From address of your mailing uses one of the configured domains. For example, if you have a site called Sales where all the lists use the From address 'newsletter@sales.example.com', then 'sales.example.com' is the sending domain that should be listed here as well as the from address so all outgoing emails are authenticated. The error message shown in the Overview occurred because the From address was configured with an @gmail.com address that did not match the Configured Domains.
Ensure That the DKIM Keys Are At Least 1,024-bits
The current minimum encryption level that is recommended is 1,024-bits.
- Navigate to Utilities > Administration > Sites
- Locate the Site you are configuring from the list and click the Advanced Configuration button on the site's row
- Check the setting for Bits and if it is less than 1,024-bits you will need to generate a new DKIM Key with at least 1,024-bits and publish it in DNS. Follow the steps in the How to configure DKIM / Domain Keys article to update your DKIM Keys to a stronger encryption level.
After disabling DomainKeys and ensuring that the From address uses a domain that is configured for DKIM with at least 1,024-bit encryption, email delivery speed is improved and there are no warning messages related to DKIM.