Administrators Frequently Asked Questions
A subscriber does not receive the list messages
To find the cause of the problem, do as follows:
- Check that the user is really subscribed to the list on the 'Manage subscribers' page.
- Check the subscriber's message delivery mode; the page about the subscriber is available by clicking on their email address from the members list. When the delivery mode is the 'Digest' mode, it is normal that the subscriber does not receive messages as soon as they are sent.
- Check that the subscriber's email address is not bouncing on the 'Bounces' page. A subscriber email address is considered to be bouncing when messages sent to it generate error logs (called "bounces"). These errors can be temporary (inbox full, mail server unavailable) or permanent (no email account for the user). In any case, the mailing list server automatically manages the deletion of addresses generating too many errors.
- Try and send a message yourself to the subscriber in order to check if he/she receives it.
- As a last resort, contact the listmaster, who will check the mail server logs in order to find the cause of the problem.
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Optimize email deliverability: Activate DMARC protection
To ensure that emails reach all subscribers in a list reliably, we recommend setting the „Protection modes“ parameter under „DMARC protection“ to „all“ for existing lists.
This:
- replaces the from address of the original sender with the list address
- adds a valid DKIM signature for the @listserv.dfn.de domain.
- Better deliverability
- DKIM-signature: Many mail servers only accept emails with a valid DKIM signature. Without this, emails could be rejected or moved to quarantine.
- Log in to https://www.listserv.dfn.de
- Open the administration page of the relevant list
- Under "Edit list configuration " (in the red bar), click on "DKIM/DMARC/ARC".
- Under "DMARC protection" -> "Protection modes" select the value "all" and click on "Apply modifications" at the bottom of the page.
- The Reply-To address remains unchanged. For lists with “From address” as reply-to address, replies are still sent to the original sender.
- For digitally signed emails, warning messages may appear as the sender and signer data do not match.
This setting is the default for newly created lists based on templates. For lists that are created by copying existing lists, the value of the original list is adopted.