It was for a followup the initial reponse, which was brush-off.
ID Subject Message Age
#956417 Re: Mail loss at mailbox chrisjj (1/1) 4 days 2 hours
But, no, it was not “for the whole issue to be resolved”. Even after I reopened the issue following the above ticket’s disappearence from the OPEN REQUESTS list without a reply, the issue was never resolved.
Which frankly is staggering. I found a major security vuln in the DH mail system, showed them that messages were going missing outside the (limited) scope of ther logs, gave them hard evidence to back it up (including a diff of the same traffic between the affected mailbox and a shadow mailbox, unaffected), and they will not even look into it.
I still think DH are the nicest and smartest people I’ve ever encountered in the hosting business (and I’d pay three times as much for the feature set, if it all worked), but I am very disappointed they don’t take more interest in getting to work reliably the basics such as mail delivery.