Sounds like your domain's DNS servers are taking too long to respond to queries.

Maybe I'm not fully understanding the issue?

I'm guessing you are not aware that Google Cloud does not allow you to send out email on port 25; you must route such outbound email through one of their approved service providers. (Or use SMTP-Auth on ports 587/465).

https://cloud.google.com/compute/docs/t ... ding-mail/

Mark

Malte, Not seeing that on any of our systems, but at one point Zimbra Support asked us, in response to other seemingly benign errors in mailbox.log, to run: zmprov ms `zmhostname` zimbraImapInactiveSessionEhcacheSize 104857600 to increase the cache size (the default is quite small). As I don't fully...

Mansoor,

Please post the output from the configuration files and tests here: https://www.missioncriticalemail.com/20 ... ick-start/

Mark

AWS snapshots of EBS volumes go to S3, which is a Region-wide service. So you can spin up a new EBS volume in a different Availability Zone in the same Region that way. You may also want to look at AWS’s new EFS storage, which works like NFS. Also Region-wide. A bit pricey because it’s new, but will...

Apparently the amavis.conf file is generated by a cron job from amavisd.conf.in Amending the latter file has made it persistent. A large percentage of Zimbra's components' configuration files are rewritten upon starting Zimbra up, as well as when the zmconfigd daemon observes a change. For a bit of...

That's very odd. I'm a Mimecast Partner and I would recommend you open a Support Case with Mimecast. I haven't seen that before.

We have a customer, where they are on Zimbra 7 , and are using TLS 1.0 connection. We want to upgrade the TLS version to at least 1.2. Please let me know, if we can do that, and what steps I need to perform for the same. Thanks Zimbra 7 is so far past end of life it is not even listed in Zimbra's c...

If running "zmcontrol status" as the zimbra user from the command prompt shows everything as running, then the red "X's" in the Home > Monitor page of the Admin Console almost always means you need to set up Zimbra's syslogging correctly. The Installation Guide has some post-inst...

Just an update from the Support Case I opened on this... Zimbra were aware of this bug and initially told me they thought the bug had been corrected in 8.8.10. I pointed out that I had experienced the bug on two separate installs. I also pointed out that others on the forums had reported this same p...