Search found 149 matches

by rleiker
Fri Jun 09, 2023 9:04 pm
Forum: /etc
Topic: Barracuda Urges Replacing - Not Patching - Its Email Security Gateways
Replies: 2
Views: 24592

Barracuda Urges Replacing - Not Patching - Its Email Security Gateways

Hi Everyone, For any who are using Barracuda's appliances, this article will be of interest: https://krebsonsecurity.com/2023/06/barracuda-urges-replacing-not-patching-its-email-security-gateways/ It’s not often that a zero-day vulnerability causes a network security vendor to urge customers to phys...
by rleiker
Wed Mar 15, 2023 10:23 pm
Forum: Administrators
Topic: Intermittent DKIM Fails With SendGrid-Generated Emails
Replies: 5
Views: 1063

Re: Intermittent DKIM Fails With SendGrid-Generated Emails

We agree that some alteration is happening after SendGrid sends the email. Not necessarily. There are likely multiple SMTP gateways/relays involved on SendGrid's end before email is handed off to your Zimbra server for delivery, and any one of those hosts may be modifying the email causing the DKIM...
by rleiker
Tue Mar 14, 2023 5:09 pm
Forum: Administrators
Topic: Intermittent DKIM Fails With SendGrid-Generated Emails
Replies: 5
Views: 1063

Re: Intermittent DKIM Fails With SendGrid-Generated Emails

Mark, I am not a Sendgrid user, so I am not familiar with how they normally use DKIM for signing their outbound email, but I can offer some hints that may lead to the root cause of the issue. When validation of a DKIM signature for an email fails, it is most commonly because something in the email w...
by rleiker
Tue Mar 14, 2023 4:36 pm
Forum: Administrators
Topic: administrator login locked out
Replies: 1
Views: 537

Re: administrator login locked out

Check if your Zimbra admin account is locked out. As the zimbra user, run: zmprov ga you@example.com zimbraAccountStatus This will produce output similar to: # name you@example.com zimbraAccountStatus: lockout If the zimbraAccountStatus is not "active" then run: zmprov ma you@example.com z...
by rleiker
Tue Mar 14, 2023 4:21 pm
Forum: Administrators
Topic: I don't understand what this means
Replies: 3
Views: 918

Re: I don't understand what this means

In the mailbox.log excerpt that you included, the key lines that stand out are: 2023-03-13 02:35:50,189 ERROR [LmtpServer] [] TcpServer/7025 - cannot handle connection; thread pool exhausted java.util.concurrent.RejectedExecutionException: Task com.zimbra.cs.lmtpserver.TcpLmtpHandler@205dbecf reject...
by rleiker
Wed Jan 18, 2023 12:42 am
Forum: Administrators
Topic: DMARC alignment in Zimbra 8.8.15
Replies: 15
Views: 10405

Re: DMARC alignment in Zimbra 8.8.15

Since we can easily override the default scores, this means you can create a very high score for the p=reject test to ensure you will never deliver an email that fails this test. Hi Mark, It can be a philosophical debate about where it is best to do spam/malware filtering. It has been much the same...
by rleiker
Tue Jan 17, 2023 11:52 pm
Forum: Administrators
Topic: DMARC alignment in Zimbra 8.8.15
Replies: 15
Views: 10405

Re: DMARC alignment in Zimbra 8.8.15

It is unfortunately sad to hear that we will have to wait Zimbra 10 to see this integrated into Zimbra, if at all... I think you will be pleasantly surprised. Zimbra 10 is a renewed focus on all things security and the current leadership at Zimbra recognizes how important this is for the product's ...
by rleiker
Thu Jan 12, 2023 8:36 pm
Forum: Administrators
Topic: DMARC alignment in Zimbra 8.8.15
Replies: 15
Views: 10405

Re: DMARC alignment in Zimbra 8.8.15

Hello Mabi, I am glad to hear you found the Zimbra email security webinar on DMARC has been helpful. I happened to see your messages today while browsing the Forum and thought I should chime in here to see if I can help provide some clarification. As you know from watching the webinar, for an email ...
by rleiker
Tue Nov 22, 2022 4:45 pm
Forum: Installation and Upgrade
Topic: 8.8.15 Patch 35: Spell & Convertd services fail to start
Replies: 3
Views: 1955

Re: 8.8.15 Patch 35: Spell & Convertd services fail to start

As an update to my last post, this issue has been acknowledged as a bug by Zimbra Support and assigned the ID: ZBUG-3126.
by rleiker
Tue Nov 22, 2022 8:42 am
Forum: Installation and Upgrade
Topic: 8.8.15 Patch 35: Spell & Convertd services fail to start
Replies: 3
Views: 1955

8.8.15 Patch 35: Spell & Convertd services fail to start

In the event you are installing 8.8.15 Patch 35 on a multi-server Zimbra cluster, where you have the Zimbra mailboxd service installed on one server and the mta service installed on another server, you may discover that after installing Patch 35 on the server with mailboxd and restarting with "...