For one of our customers we make use of the e-mail marketing within Dynamicweb 9.7.3. The regular e-mails are sending correctly, but the ones with personalisation in them not. We have increased the max. mailing size on the mailserver, but also with no effect. Let's say there is a mailing with 5.000 recipients, the mailing stucks around 1.000. After clicking resend the mailing goes further, but gives also an error on the unsubscribe link for the following batches.
Do you need more info to investigate this?