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To track your listing you can use The Spamhouse Project (https://www.spamhaus.org) or MX Toolbox (https://mxtoolbox.com/).
Configure your Message-ID to contain your sender domain
Certain email providers expect the Message-Id header to end with the official sender domain name. Set cmsbs.mail.messageId.hostname accordingly.
Format of Message-ID header as sent by UM: UM.<delivery_ticket>@<domain>
delivery_ticket is the Delivery Ticket of the outgoing email.
By default, domain is the name or the IP address of the SMTP server given in cmsbs.mail.smtpserver. This part can be overwritten via cmsbs.mail.messageId.hostname.
Optional technical measures
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