Have you created the required DKIM, DMARC & SPF records on external DNS server (which is where they should be)?

Я боюсь, я не могу быть много помочь, как я не использую Ubuntu и сломанной менеджер пакетов является одной из причин. :) Это не кажется, что проблема с Zimbra. Попробуйте запустить следующие и посмотреть, если он бросает какие-либо ошибки: apt-get update && apt-get upgrade Кроме этого, я не...

The magic word you're looking for is 'fallback' to allow authentication via ZCS. Enter the following two words in the search box (top right on this page): fallback authenticate - that will get you the details you need.

jered wrote:Thank you! It was indeed the new 3.13.0-155 kernel; apologies for the panic.

It's no problem but understandable, I'm glad that fixed it.

This is not caused by Zimbra it's most likely because of the updated kernel, take a look at this thread: viewtopic.php?f=15&t=64696

Какие ошибки вы действительно видите при попытке запустить ZCS?

A new patch has been released for ZCS 8.8.9: https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.9/P3 I should mention that the notes tell you to run "yum install zimbra-patch" - that only works for the first time you install a patch on a specific version of ZCS, after that it's obviously &qu...

Вы недавно обновили Ubuntu (в частности, ядро)? Если у вас есть, возможно, вы захотите взглянуть на эту тему: viewtopic.php?f=15&t=64696 -
Затем вернитесь к предыдущему ядру

The brief answer from is I don't know. They look like updates to me as they're the most recent version of those components on my systems (which is CentOS7 ZCS 8.8.9) which is on the most recent ZCS patch level for my version. Is there any reason you're not on the most recent ZCS release? In any case...

Is it safe to upgrade these packages? Or do I need to perform a full upgrade some other way? You haven't given any details of your ZCS version, you should always post the full output of the following command: zmcontrol -v I'd also suggest you read the applicable Release Notes in the wiki for your Z...