On Friday the 24th of May one of our servers ran out of storage space. This resulted in the server being unable to properly log delivery of e-mails and registering statistics. All e-mails have been sent but the logs that are used for the statistics are not available. This means that data from newsletters from around 4pm CEST until 11pm CEST is incomplete. We sincerely apologise for the issue. We are working on improving our monitoring of our servers so we will spot storage space running out before it results in issues with the platform.