Instructions for IT support

  • Updated

Many email service providers have lately tightened their spam filter features and due to this newsletters are more likely to end up in these spam filters than before, or be entirely blocked by the receiving server.

The reason for this is usually the sending address not being identified and discrepancies between the sender and message content (links).

In these instructions, we inform you how to perform the needed actions to ensure the delivery of your newsletters.


DKIM verification and SPF validator inform the receiving server that LianaMailer's sending server has the authorization to use the @customer's address as the sender. In order for newsletters to reach the receiver as well as possible, forwarding for DKIM and, if necessary, SPF validators should be added to the DNS information of the sending domain. Also, a separate subdomain should be created for the subscription/unsubscription page. Taking these measures ensures that in the message both the second level sending domains and envelope sender are the same throughout.

DKIM verification is naturally only set to the customer's own LianaMailer account.

Example: address is used as the sender of a newsletter and the subscription page uses LianaMailer's default address "". Therefore, the message's envelope-sender is, and also the links in the newsletter refer to this same address. In this case, the receiving server sees inconsistencies with the sender and the message and this might result in the message not being delivered at all or being directed to the recipient's spam folder.

However, if the sender is and the subscription page address "", then also envelope-sender is Message links then also start with the same URL, and the message is more likely delivered to the recipients.

Follow these instructions to ensure the delivery of your newsletters

  1. DKIM (+SPF) + subdomain forward data is requested from Liana's tech support ( With the request, you should indicate which subdomain will be used. If there are many services in use and multiple subscription/unsubscription pages and you want the delivery-improving settings enabled on all of them, please provide information on all of these (e.g. use of multiple subdomains).
  2. Our support provides the needed forwarding information to the customer.
  3. The customer or the admin of the customer's domain makes DKIM and subdomain forwarding changes to the domain's DNS information. Our support then must be notified of the changes at
  4. The customer or the admin of the customer's domain sets the SPF validator for the domain in use, if necessary. Liana's support team can check this need when the request is made.
  5. Liana's support team sets the forwarded subdomain for the subscription/unsubscription page and checks the manually set subscription/unsubscription pages of templates and changes them if necessary.
  6. Support notifies the customer once the settings are enabled.


SPF (Sender Policy Framework) validator informs the receiving server that the sending server has the authorization to use the sender address for sending. Liana's support team checks the need for SPF upon request and provides the right SPF validator. 

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