Greetings from your Cloudiance email support team!
We have been receiving new tickets, and resolving more issues with Apple Mac Mail than usual, especially for customers who have recently upgraded their operating systems to Apple's Big Sur, and with customers using Mac Mail with large mailboxes (over 20GB). These issues are not unique to Cloudiance's zMailCloud, they seem to be affecting some users of Apple Mac Mail globally, regardless of service provider.
As we're learning more about the issue, we've been adding to a new, Apple Mac Mail knowledgebase article. If you're having issues, please read through it. We welcome your questions, and feedback!
[Mac Mail Mystery: The case of the disappearing emails (advanced troubleshooting techniques)](https://admin.cloudiance.com/knowledgebase.php?action=displayarticle&catid=6&id=64)
If you have a chance to visit the Knowledgebase, you may notice we've both re-organized it, and revised it significantly to be of greater assistance to you, and us as a reference of best practices we improve together.
This is part of a greater upgrade we're undergoing, and we're looking forward to sharing more and better resources, along with some new products, with you before the end of the year.
Thank you for your business.
Friday, October 8, 2021
