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How to change the default SMTP port (25)

Last post by arifjsn « Wed Nov 12, 2025 5:40 am

by arifjsn » Wed Nov 12, 2025 5:40 am

How to change the default SMTP port (25) because port 25 is blocked by Yahoo, I want to use port 465 or 587.

I am using Zimbra 8.8.15_GA_4717.FOSS...

0 Replies

30 Views

Last post by arifjsn
Wed Nov 12, 2025 5:40 am
Zimbra 10.1.9 errors in mailbox.log: mailbox - error copying notifications; will notify with live set

Last post by sysadmin@ion.lu « Tue Nov 11, 2025 4:52 pm
Replies: 6
by thomas.klaube » Mon Jul 28, 2025 12:16 pm

Hi all,

on some of our Zimbra Servers we see error messages like these:

2025-07-28 00:11:58,792 WARN mailbox - error copying notifications; will...

6 Replies

7366 Views

Last post by sysadmin@ion.lu
Tue Nov 11, 2025 4:52 pm
Zimbra web sending email error

Last post by Blisk « Fri Nov 07, 2025 2:11 pm
Replies: 10
by Blisk » Thu Nov 06, 2025 9:12 pm
1

2
I have Release 10.0.8_GA_0224.RHEL8_64_20240627073153 RHEL8_64 FOSS edition.
on Rocky Linux release 8.10 (Green Obsidian)

When ever I try to send...
10 Replies

843 Views

Last post by Blisk
Fri Nov 07, 2025 2:11 pm
ClamAV update 1.0.8 -> 1.0.9

Last post by halfgaar « Thu Nov 06, 2025 8:10 pm
Replies: 5
by oetiker » Mon Oct 20, 2025 3:17 pm

Hi

Zimbra 10 runs still ClamAV 1.0.8 (ZBUG-5100, Clam-av has critical vulnerabilities)

zimbra-clamav 1.0.8-1zimbra8.8b4.22.04 ClamAV Binaries...

5 Replies

1187 Views

Last post by halfgaar
Thu Nov 06, 2025 8:10 pm
A single user's inbox will not preload beyond 400 messages.

Last post by yellowhousejake « Tue Nov 04, 2025 12:35 pm
Replies: 8
by yellowhousejake » Wed Sep 17, 2025 12:32 pm

I have one user who, when scrolling through their inbox, cannot load more than 400 messages before it will not load more messages.

- User logs in.
-...

8 Replies

2424 Views

Last post by yellowhousejake
Tue Nov 04, 2025 12:35 pm
Hardware Requirements for 300 Mailboxes (100GB Each)

Last post by rojoblandino « Wed Oct 29, 2025 7:02 pm
Replies: 2
by DMSE-DESK » Wed Aug 06, 2025 11:36 am

Hi Team,

Could you please advise on how to calculate the required hardware specifications for hosting 300 mailboxes, each with a size of 100 GB?...

2 Replies

7930 Views

Last post by rojoblandino
Wed Oct 29, 2025 7:02 pm
How does zmprov rd OLDDOMAIN NEWDOMAIN affect GAL

Last post by yellowhousejake « Wed Oct 29, 2025 1:55 pm
Replies: 4
by yellowhousejake » Mon Oct 27, 2025 1:10 pm

We are rapidly approaching the day when I move our domain from a .org to a .gov.

In reviewing the road map I have laid out and listening to users...

4 Replies

579 Views

Last post by yellowhousejake
Wed Oct 29, 2025 1:55 pm
I can't send emails to Gmail, Outlook, Yahoo but I can receive

Last post by rojoblandino « Tue Oct 28, 2025 7:00 pm
Replies: 7
by jreyes256 » Thu Mar 24, 2022 12:46 am

Greetings.
I have the problem that I cannot send mail to those domains mentioned, my version of zimbra is Release...

7 Replies

44864 Views

Last post by rojoblandino
Tue Oct 28, 2025 7:00 pm
After last upgrade suddenly some log files grow a lot

Last post by rojoblandino « Tue Oct 28, 2025 6:44 pm
Replies: 2
by ryleybob » Tue Sep 16, 2025 3:09 am

mailbox log was 13 G and everyday a trace log is about 3 G

2 Replies

2108 Views

Last post by rojoblandino
Tue Oct 28, 2025 6:44 pm
How do I calculate the number of emails a user sends?

Last post by rojoblandino « Tue Oct 28, 2025 5:44 pm
Replies: 12
by mr00t » Wed Nov 13, 2019 8:57 am
1

2
hello everyone,

when I examined the zimbra.log file, I noticed that a user sent 75,000 emails. cat /var/log/zimbra.log | grep -i sasl_username |...
12 Replies

18974 Views

Last post by rojoblandino
Tue Oct 28, 2025 5:44 pm
urgent help needed Zimbraserver crashes every 30 minutes and i can't find the cause

Last post by rojoblandino « Tue Oct 28, 2025 4:54 pm
Replies: 2
by harry@ice.be » Mon Oct 13, 2025 8:26 am

hi
my zimbra server crashes every 30 minutes -see sql log
In my mailbox log i always see this happening and the sql server crashed
2025-10-13...

2 Replies

721 Views

Last post by rojoblandino
Tue Oct 28, 2025 4:54 pm
How to archive large mailboxes?

Last post by rojoblandino « Tue Oct 28, 2025 4:12 pm
Replies: 2
by brunob » Mon Oct 20, 2025 11:01 am

Hi @all,

I am trying archive a large mailbox (~30 GB) with:
zmmailbox -z -m $USER getRestURL //?fmt=tgz > /opt/zimbra/backup-archived/$USER.tgz...

2 Replies

692 Views

Last post by rojoblandino
Tue Oct 28, 2025 4:12 pm
iOS 18 doesn't save sent mail on server

Last post by rojoblandino « Tue Oct 28, 2025 3:23 pm
Replies: 5
by jjakob » Fri Oct 04, 2024 5:14 pm

Hi. I am trying to find what could be causing this issue that one of our clients is reporting has started happening a couple days ago. He can send...

5 Replies

3461 Views

Last post by rojoblandino
Tue Oct 28, 2025 3:23 pm
Issue with Zimbra to New Mail Server Migration Using imapsync and account delegation

Last post by Klug « Mon Oct 27, 2025 9:21 am
Replies: 1
by zainalara » Mon Oct 27, 2025 3:23 am

I'm trying to migrate a mailbox from a Zimbra server to another mail server. I've created a technical user tech-migration@example.com and granted it...

1 Replies

345 Views

Last post by Klug
Mon Oct 27, 2025 9:21 am
I have a problem with imap NIO:zimbraImapMaxConsecutiveError exceeded 5

Last post by mocha « Fri Oct 24, 2025 8:03 pm
Replies: 5
by tomeks11 » Fri Jul 01, 2022 11:15 am

I often have a problem with saving a sent message to the sent foder. Then I have a lot of messages in my logs:
2022-07-01 11:47:38,945 INFO imap -...

5 Replies

4934 Views

Last post by mocha
Fri Oct 24, 2025 8:03 pm
[CRITICAL] Zimbra 10.1.10 - Authentication anomaly

Last post by adrian.gibanel.btactic « Thu Oct 16, 2025 10:48 am
Replies: 2
by zimbraadmin789789 » Tue Oct 14, 2025 12:58 pm

Hi, after update from Zimbra OSE 10.0.13 to 10.1.10 there is a problem with imaps authentication.

I'll try to explain:
- I have 5 store server...

2 Replies

1062 Views

Last post by adrian.gibanel.btactic
Thu Oct 16, 2025 10:48 am
Mailbox connects to MTA using TLS or STARTTLS

Last post by yeak « Wed Oct 15, 2025 5:02 am

by yeak » Wed Oct 15, 2025 5:02 am

I am wondering how to make Zimbra Mailboxd to connect to Zimbra MTA using TLS (465). Currently this zimbraSmtpHostname is set to localhost:25, if it...

0 Replies

985 Views

Last post by yeak
Wed Oct 15, 2025 5:02 am
Request for Advice - OS upgrade/migration

Last post by Klug « Sat Oct 11, 2025 12:34 pm
Replies: 18
by DennisT » Wed Jun 30, 2021 3:40 pm
1

2
Hi,
I have a single server ZCS NE install (8.8.15) on a Ubuntu 14 VM. Zimbra is dropping support for v14 so I need to move to a newer OS version....
18 Replies

28218 Views

Last post by Klug
Sat Oct 11, 2025 12:34 pm
After Browser Refresh, forced login (unknown error).

Last post by adrian.gibanel.btactic « Fri Oct 10, 2025 3:36 pm
Replies: 9
by Ace Suares » Tue Jan 28, 2025 11:32 am

Probably since the last update to 10.1.4.GA.4200000.UBUNTU20.64 UBUNTU20_64 FOSS edition, users experience *someetimes* a forced logout after browser...

9 Replies

6630 Views

Last post by adrian.gibanel.btactic
Fri Oct 10, 2025 3:36 pm
Autocomplete behaviour change between 9.0 and 10.1

Last post by oetiker « Thu Oct 09, 2025 2:23 pm
Replies: 21
by Klug » Fri Jun 13, 2025 1:02 pm
1

2

3
Hello.

I've been working on some upgrade from 9.0 to 10.1 this week (rolling upgrade, multi-servers).
We've noticed a change of behavior in...
21 Replies

16323 Views

Last post by oetiker
Thu Oct 09, 2025 2:23 pm
Zimbra Auto Provisioning with AD group filter not working after first sync

Last post by adrian.gibanel.btactic « Thu Oct 09, 2025 10:25 am
Replies: 4
by stalker » Fri Sep 12, 2025 4:13 pm

Environment
Zimbra: Release 10.1.11.GA.4655.UBUNTU22_64 NETWORK edition.
Active Directory: Windows Server 2022 Standard 21H2

I am trying to...

4 Replies

2580 Views

Last post by adrian.gibanel.btactic
Thu Oct 09, 2025 10:25 am
Question about update

Last post by adrian.gibanel.btactic « Thu Oct 09, 2025 10:08 am
Replies: 6
by sgpsistemas » Thu Sep 11, 2025 3:05 pm

Good mornings,

We are contacting you from a company in Argentina. We currently use a Zimbra email server managed by a local provider.

In the last...

6 Replies

2624 Views

Last post by adrian.gibanel.btactic
Thu Oct 09, 2025 10:08 am
Zimbra restriction of forwarding to addresses within the domain

Last post by adrian.gibanel.btactic « Thu Oct 09, 2025 9:59 am
Replies: 2
by GustavoFring » Thu Sep 11, 2025 11:16 am

I am trying to find a solution to my problem. We are deploying Zimbra in our company and I need to restrict users from forwarding messages only to...

2 Replies

1731 Views

Last post by adrian.gibanel.btactic
Thu Oct 09, 2025 9:59 am
Need help setting up Zimbra admin for creating staff/student emails with send limits

Last post by arun31cs12 « Fri Oct 03, 2025 10:49 am

by arun31cs12 » Fri Oct 03, 2025 10:49 am

Hello,

I am setting up Zimbra for a school and need guidance on how to:

Create an admin account (or delegated admin) that can manage user accounts...

0 Replies

1646 Views

Last post by arun31cs12
Fri Oct 03, 2025 10:49 am
Webmail Stuck on “Loading” – Unable to Access Zimbra

Last post by Klug « Sat Sep 27, 2025 11:26 am
Replies: 1
by arun31cs12 » Fri Sep 26, 2025 8:47 pm

Hello,

I am the Zimbra administrator and I’m facing an issue with the webmail interface. When I try to log in, the page shows “Loading” but never...

1 Replies

1650 Views

Last post by Klug
Sat Sep 27, 2025 11:26 am

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