Why are your emails to KPN addresses not arriving?
Is your newsletter not arriving for subscribers with a KPN address, while the rest of your delivery goes through as normal? KPN uses external filter software that inspects the content of all incoming emails and rejects messages based on its findings. Every now and then, this results in false positives: newsletters that are rejected by mistake.
If this issue is not limited to KPN addresses, please first check what to do if your newsletter does not arrive.
KPN email domains
Over the years, KPN has acquired a large number of domains. Emails sent to all of the following addresses are processed by KPN’s systems:
@kpnmail.nl, @kpnplanet.nl, @planet.nl, @hetnet.nl, @wxs.nl, @freeler.nl, @xs4all.nl, @hccnet.nl, @telfort.nl, @telfortglasvezel.nl, @tiscali.nl, @tiscalimail.nl, @worldonline.nl, @12move.nl, @tip.nl, @xmsnet.nl, @kickmail.nl, @on.nl, @onsbrabantnet.nl, @onsmail.nl, @onsnet.nu, @onsneteindhoven.nl, @onsnetnuenen.nl and @snelnet.net.
Reporting a blocked newsletter to KPN
KPN has an easily accessible helpdesk specifically for spam and delivery issues. They can adjust the filter.
Report the problem to the KPN helpdesk
Send an email to abuse@kpnmail.nl to report that your newsletter is not being delivered. KPN will then ask you to send an example of the undelivered newsletter to an address they provide.
KPN will usually adjust the filter based on that example, ensuring your next newsletter arrives as normal.