Installation and Upgrade

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Insecure log4j version in Zimbra 10.1.21

Last post by gommatermica « Fri Oct 16, 2026 6:05 am
Replies: 2
by DynamicOwl » Wed Oct 14, 2026 9:54 pm

Tenable Nessus scans of our Zimbra 10.1.21 server are showing that Apache Log4j 2.17.1 is installed under /opt/zimbra/lib/jars/log4j-core-2.17.1.jar...

2 Replies

1513 Views

Last post by gommatermica
Fri Oct 16, 2026 6:05 am
10.1.21 has been released.

Last post by zimico « Sun Oct 11, 2026 1:12 pm
Replies: 13
by rainer_d » Thu Sep 24, 2026 2:39 pm
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Well, for us paying customers at least.

Looks like a lot of new things and new features.

We will see how it works out.
13 Replies

6407 Views

Last post by zimico
Sun Oct 11, 2026 1:12 pm
Enabling mail recall on 10.1.21

Last post by DynamicOwl « Wed Oct 07, 2026 7:32 pm
Replies: 4
by DynamicOwl » Tue Oct 06, 2026 2:59 am

Does Zimbra Archiving and Discovery (ZAD) need to be installed for the new mail recall feature to be enabled? The admin guide says that...

4 Replies

2482 Views

Last post by DynamicOwl
Wed Oct 07, 2026 7:32 pm
Maldua's Zimbra FOSS Builds - Share your feedback

Last post by ghen « Wed Sep 30, 2026 10:58 am
Replies: 141
by adrian.gibanel.btactic » Sat Jan 10, 2026 7:12 pm
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Maldua's Zimbra FOSS Builds - Share your feedback

This thread is about getting feedback from Maldua's Zimbra FOSS Builds.

- Main (Recommended)...
141 Replies

233615 Views

Last post by ghen
Wed Sep 30, 2026 10:58 am
Recovering Zimbra 8 OpenSource edition after system failure

Last post by kayasaman « Tue Sep 08, 2026 12:52 pm
Replies: 2
by kayasaman » Mon Sep 07, 2026 3:10 pm

Hi everyone,

I'm a little worried here as I'm trying to reinstall my Zimbra setup.

Originally I was using CentOS but switched using the in house...

2 Replies

3121 Views

Last post by kayasaman
Tue Sep 08, 2026 12:52 pm
zmmailbox : Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

Last post by mocha « Wed Sep 02, 2026 5:20 pm
Replies: 22
by Leeloo » Tue May 27, 2025 8:02 am
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Hello,

I use zmmailbox to create dump/backup of my mailboxes.
But after upgrade to Release 10.1.8 .GA.4633.RHEL8_64.20240610085557 NETWORK edition....
22 Replies

56573 Views

Last post by mocha
Wed Sep 02, 2026 5:20 pm
upgrading from 8.8.15 to latest

Last post by Klug « Fri Aug 14, 2026 7:57 am
Replies: 3
by zanthius » Mon Jul 27, 2026 2:48 am

So many moons ago I remember reading that 8.8 will be the last free version and I haven't gone looking since, but it seems that it has kept going and...

3 Replies

8614 Views

Last post by Klug
Fri Aug 14, 2026 7:57 am
Zimbra 10.1.20 Released - Please Post Your Patch/Upgrade Results Here

Last post by ghen « Sun Jul 26, 2026 1:52 pm
Replies: 8
by adrian.gibanel.btactic » Mon Jul 20, 2026 7:16 pm

Release Notes:

Please post your patching and/or upgrading results here.

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Changes summary
( This is an small summary. Check the release...

8 Replies

10269 Views

Last post by ghen
Sun Jul 26, 2026 1:52 pm
Zimbra 10.1.19 Released - Please Post Your Patch/Upgrade Results Here

Last post by ghen « Wed Jul 08, 2026 9:41 am
Replies: 3
by adrian.gibanel.btactic » Tue Jul 07, 2026 7:25 am

Release Notes:

Please post your patching and/or upgrading results here.

---

Changes summary
( This is an small summary. Check the release...

3 Replies

5619 Views

Last post by ghen
Wed Jul 08, 2026 9:41 am
Zimbra 10.1.18 Released - Please Post Your Patch/Upgrade Results Here

Last post by rainer_d « Wed Jun 24, 2026 9:23 am
Replies: 17
by adrian.gibanel.btactic » Tue Jun 16, 2026 10:39 am
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Release Notes:

Please post your patching and/or upgrading results here.

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This is an emergency release previously announced on Upgrade...
17 Replies

44387 Views

Last post by rainer_d
Wed Jun 24, 2026 9:23 am
Zimbra 10.1.18 Patch Release

Last post by ashish.kataria « Thu Jun 18, 2026 8:05 am
Replies: 12
by L. Mark Stone » Fri Jun 12, 2026 7:43 pm
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Let's use this thread please to discuss the 10.1.18 release, instead of appending to the 10.1.17 thread.

Question for Zimbra:
Can we get greater...
12 Replies

17083 Views

Last post by ashish.kataria
Thu Jun 18, 2026 8:05 am
Zimbra 10.1.17 Released - Please Post Your Patch/Upgrade Results Here

Last post by ghen « Fri Jun 12, 2026 1:37 pm
Replies: 24
by adrian.gibanel.btactic » Thu May 28, 2026 9:41 am
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Release Notes:

Please post your patching and/or upgrading results here.

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Upgrade to Zimbra 10.1.17 is not recommended !!!

A new critical...
24 Replies

28127 Views

Last post by ghen
Fri Jun 12, 2026 1:37 pm
Upgrade from Zimbra 10.1.04_GA FOSS to 10.1.16_GA FOSS

Last post by adrian.gibanel.btactic « Thu Jun 04, 2026 9:19 am
Replies: 1
by capnino » Wed Jun 03, 2026 12:11 pm

Dear all,
I would like to use the pre-compiled packages of Zimbra Maldua to upgrade my Zimbra 10.1.04_GA FOSS to 10.1.16_GA FOSS on my Ubuntu 22.04...

1 Replies

6024 Views

Last post by adrian.gibanel.btactic
Thu Jun 04, 2026 9:19 am
Ubuntu 24.04 install/upgrade feedback (ZCS NE)

Last post by BradC « Fri May 29, 2026 1:08 pm
Replies: 3
by adrian.gibanel.btactic » Thu May 28, 2026 10:12 am

Ubuntu 24.04 support has been made GA in ZCS NE 10.1.17 .

I believe that means that Synacor considers:

- Installing ZCS NE 10.1.10 to Ubuntu 24.04...

3 Replies

9225 Views

Last post by BradC
Fri May 29, 2026 1:08 pm
Zimbra 10 FOSS Installation Guide

Last post by halfgaar « Fri May 29, 2026 12:29 pm
Replies: 163
by innotelinc » Tue Sep 05, 2023 6:08 pm
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****** UPDATED GUIDE RIGHT HERE *******

Hello everyone, it's been a while! Good to see many who've made progress on this script here is the updated...
163 Replies

3104506 Views

Last post by halfgaar
Fri May 29, 2026 12:29 pm
Zimbra 10.1.16 Released - Please Post Your Patch/Upgrade Results Here

Last post by 7224jobe « Thu May 14, 2026 7:38 am
Replies: 37
by adrian.gibanel.btactic » Wed Feb 04, 2026 11:13 am
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Release Notes:

Please post your patching and/or upgrading results here.

---

( This is a very small summary. Check the release notes above for...
37 Replies

75289 Views

Last post by 7224jobe
Thu May 14, 2026 7:38 am
disabling the daily mail activity reports

Last post by milauria « Sat May 09, 2026 7:39 am
Replies: 5
by needhelpnow » Tue Apr 15, 2008 5:39 pm

Hi I am running ZCS 5.0 on RHEL 4 and I see that there are lot of daily mail reports getting generated and sent automatically to admin@domain. can...

5 Replies

17761 Views

Last post by milauria
Sat May 09, 2026 7:39 am
Another head-scratcher: moving an account with a "+" sign in the name

Last post by rainer_d « Thu Apr 23, 2026 10:39 am
Replies: 7
by rainer_d » Wed Apr 22, 2026 8:15 am

Almost 10 years ago, somebody created an account with a + sign (like a+b@ce.de ).

When I try to move that account, the logs make it look like zimbra...

7 Replies

28999 Views

Last post by rainer_d
Thu Apr 23, 2026 10:39 am
Can we upgrade the mariadb of zimbra mailstore - running on 10.1.5

Last post by Balthazar « Thu Apr 23, 2026 9:57 am
Replies: 5
by zimuzer » Tue Mar 04, 2025 2:07 pm

Hi, is it possible to upgrade the mariadb version, current is Server version: 10.1.25-MariaDB . Reason for asking is, we encountered some issue when...

5 Replies

25131 Views

Last post by Balthazar
Thu Apr 23, 2026 9:57 am
"wiki" account in Zimbra?

Last post by rainer_d « Thu Apr 23, 2026 7:31 am
Replies: 4
by rainer_d » Tue Apr 21, 2026 1:00 pm

Hi,

I have an account wiki under the default domain of the server.
This account cannot be moved to another server with zmmboxmove, it seems?

It...

4 Replies

18508 Views

Last post by rainer_d
Thu Apr 23, 2026 7:31 am
Intermittent POP3 password prompts on ZCS 10.1.14 (no authentication logs, proxy issue)

Last post by Matiaz « Tue Apr 21, 2026 11:59 am
Replies: 4
by Matiaz » Wed Nov 26, 2025 5:47 pm

Hello everyone,
I need help diagnosing a strange POP3 issue on our Zimbra 10.1.14 installation.

We are experiencing intermittent POP3 password...

4 Replies

29611 Views

Last post by Matiaz
Tue Apr 21, 2026 11:59 am
A bunch of mails sent by root@domain.com

Last post by vchong68 « Tue Apr 21, 2026 11:50 am
Replies: 7
by dfreddie » Wed Apr 08, 2026 7:24 pm

After upgrade to 10.1.16p1 Maldua FOSS, I noticed 1411 mails sended every day by mail.domain.com (my domain)!
I've looked up in zimbra.log and I've...

7 Replies

41078 Views

Last post by vchong68
Tue Apr 21, 2026 11:50 am
Zimbra 10.1.14 owasp breaks HTML mails

Last post by Martinwiertz « Fri Mar 20, 2026 9:11 am
Replies: 17
by thomas.klaube » Mon Nov 17, 2025 9:17 am
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Hi all,

after updating to ZCS 10.1.14 some HTML mails are not being rendered correctly or displayed at all. We have seen this happening with shopify...
17 Replies

40089 Views

Last post by Martinwiertz
Fri Mar 20, 2026 9:11 am
Possible Bug - nginx proxy not seeing memcache when DoS workaround applied

Last post by liverpoolfcfan « Thu Mar 19, 2026 9:16 am
Replies: 7
by guitardood » Thu Jan 24, 2019 11:45 am

Hello All,
I just found a problem while troubleshooting another issue. For some reason, in the nginx.log file, I found it littered with the error no...

7 Replies

15902 Views

Last post by liverpoolfcfan
Thu Mar 19, 2026 9:16 am
zimbra : problem with defaults entries

Last post by sb0373 « Tue Mar 17, 2026 6:41 am
Replies: 2
by rondo2 » Wed Oct 07, 2015 4:26 pm

I am having an issue in which the admin account is getting repeated emails with the following:
*** SECURITY information for mail.xxxx.us ***...

2 Replies

11899 Views

Last post by sb0373
Tue Mar 17, 2026 6:41 am

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