User contributions for Barry de Graaff

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17 April 2024

  • 09:4709:47, 17 April 2024 diff hist +1,261 N ZimbraMobileForceSamsungProtocol25Created page with "= How to fix Samsung Phones not being able to send mail (ActiveSync) = In this article you will find a short how-to on how to fix the issue that some Samsung phones can receive mail, see calendars, but cannot send mail via Zimbra. Users will see messages go immediately to the outbox with a warning that the message was not sent. = ActiveSync protocol version = This issue affects only some Samsung devices that use the Samsung Email app. To fix this issue you can set the..." current

9 April 2024

8 April 2024

  • 13:1513:15, 8 April 2024 diff hist −5 m OVH transparencyNo edit summary current
  • 12:4612:46, 8 April 2024 diff hist +2,999 N Zimbra not affected by XZ backdoor vulnerability CVE-2024-3094Created page with "= Zimbra not affected by XZ backdoor vulnerability CVE-2024-3094 = XZ Utils is nearly ubiquitous in Linux. It provides lossless data compression on virtually all Unix-like operating systems, including Linux. xz Utils provides critical functions for compressing and decompressing data during all kinds of operations. xz Utils also supports the legacy .lzma format, making this component even more crucial. Zimbra supported operating systems are not affected, in addition Zim..." current

26 March 2024

15 March 2024

13 March 2024

7 March 2024

  • 13:3513:35, 7 March 2024 diff hist +3,001 N Spamassassin custom rulesCreated page with "= Custom SpamAssassin Rules in Zimbra = In this article you will learn how to add custom SpamAssassin Rules to Zimbra. This way you can filter email that may have fooled your spam filtering or mitigate vulnerabilities such as CVE-2024-21413 where <code>file://</code> hyperlinks cause problems in MS Outlook. = SpamAssasin localrules = In this example we are going to filter email that contains the text <code>file://</code> and move it into the Junk folder. Create the fi..." current

1 March 2024

28 February 2024

22 February 2024

26 January 2024

22 January 2024

16 January 2024

11 January 2024

19 December 2023

7 December 2023

21 November 2023

15 November 2023

18 October 2023

6 October 2023

5 October 2023

27 September 2023

  • 08:5208:52, 27 September 2023 diff hist +1,314 N Permissions-PolicyCreated page with "= Permissions-Policy = Please note that the Permissions-Policy standard is currently only a DRAFT, and not supported in all browsers. Meaning, browsers that do not support it, will ignore whatever policy you define. The Permissions-Policy standard allows the Zimbra server to set what features can be used by the web browser. For example if you do not use any video conferencing you can prevent the browser from asking permission for using the web camera and/or microphone...." current

21 September 2023

19 September 2023

7 September 2023

5 September 2023

24 August 2023

21 August 2023

16 August 2023

13 August 2023

11 August 2023

8 August 2023

7 August 2023

4 August 2023

25 July 2023

18 July 2023

17 July 2023

14 July 2023

5 July 2023

  • 06:5006:50, 5 July 2023 diff hist −75 m Authentication/SAMLNo edit summary
  • 06:4806:48, 5 July 2023 diff hist +13,651 N Authentication/SimpleSAMLPhpCreated page with "= Zimbra with on premise Single Sign-On using SimpleSAMLphp = SAML is an open standard for Single Sign-On. When using SAML an Identity Provider (IdP) will take care of user authentication after which users can use their applications without having to log-on to each of them separately. In SAML these applications are called Service Providers (SP). In this guide we will set-up SimpleSAMLphp to act as SAML IdP. And we configure the IdP to use Zimbra’s LDAP to validate the..."

22 June 2023

  • 08:1608:16, 22 June 2023 diff hist −4 m FIPSNo edit summary
  • 08:1508:15, 22 June 2023 diff hist +539 N FIPSCreated page with "=====How to enable FIPS on Zimbra===== See the following wiki pages: https://github.com/Zimbra/packages/wiki/OpenSSL,-Postfix-and-Nginx-TLS-1.3-GA-release#enable-fips-mode-in-rhel6 https://github.com/Zimbra/packages/wiki/OpenSSL,-Postfix-and-Nginx-TLS-1.3-GA-release#enable-fips-mode-in-rhel7 https://github.com/Zimbra/packages/wiki/OpenSSL,-Postfix-and-Nginx-TLS-1.3-GA-release#enable-fips-mode-in-rhel8 https://github.com/Zimbra/packages/wiki/OpenSSL,-Postfix-and-Ngin..."

20 June 2023

16 June 2023

  • 07:0007:00, 16 June 2023 diff hist +269 SecopstipsNo edit summary
  • 06:5806:58, 16 June 2023 diff hist +1,576 N Notification for certificate expirationCreated page with "= Get an email notification when Zimbra TLS certificates are about to expire = In many cases IT staff will have automated TLS certificates so they are renewed and deployed automatically. However sometimes the automation fails or deployments use an additional reverse proxy or web application firewall in front of Zimbra. In the latter case, sometimes the renewal of the Zimbra self-signed certificate is overlooked. Zimbra (LDAP) requires a TLS certificate that is not expi..." current

14 June 2023

24 May 2023

10 May 2023

8 May 2023

4 May 2023

28 April 2023

24 April 2023

11 April 2023

  • 14:2014:20, 11 April 2023 diff hist +3,550 N Sending incoming email with bad headers to JunkCreated page with "= Sending incoming email with bad headers to Junk = Email is always evolving and recently Gmail has started to reject email with bad headers for some customers. Rejecting email with bad headers may help protect against DKIM replay attacks (more on replay attacks in an upcoming blog). When we are talking about messages with bad headers, we mean messages that are not compliant with RFC 5322. Emails with duplicated Message-ID header are one example of bad header messages...." current

4 April 2023

  • 14:3314:33, 4 April 2023 diff hist +90 N OVH transparencyCreated page with " Synacor has not received any government or law enforcement requests since 4th April 2023"
  • 09:5209:52, 4 April 2023 diff hist +2,614 N 10 steps to check Zimbra server for compromiseCreated page with "= 10 steps to check Zimbra server for compromise = Hackers often install webshells on onpatched Zimbra systems and then wait for some time before actually abusing the compromised system. Especially on systems where critical security patches where installed too late, it may seem all was OK, where in fact a hacker has already gained access to the system, but did not do any other malicious activities yet. To check if the vulnerability is potentially leveraged on an unpatc..." current

28 March 2023

  • 08:1408:14, 28 March 2023 diff hist +157 Main PageNo edit summary
  • 08:1308:13, 28 March 2023 diff hist +5,251 N JspawnhelperCreated page with "= When your security scanner alerts for jspawnhelper in Zimbra = Many administrators rely on third-party security scanners such as Crowdstrike Falcon to analyze their Zimbra server for malicious activity. One process that is frequently reported is jspawnhelper. = What is jspawnhelper? = While this is not very well documented, jspawnhelper can be run as the result of a call to ProcessBuilder.start() or Runtime.exec() in a java application. jspawnhelper is provided by O..." current

23 March 2023

16 March 2023

14 March 2023

13 March 2023

10 March 2023

8 March 2023

7 March 2023

2 March 2023

21 February 2023

6 February 2023

3 February 2023

  • 10:5710:57, 3 February 2023 diff hist +1,905 N ChatVideoCreated page with "= Overview of Chat and Video integrations in Zimbra = Here is a short overview of all the Chat/Video integrations that are available for Zimbra. In the table you can not only..."

2 February 2023

1 February 2023

31 January 2023

30 January 2023

26 January 2023

25 January 2023

18 January 2023

13 January 2023

4 January 2023

23 December 2022

22 December 2022

21 December 2022

20 December 2022

15 December 2022

14 December 2022

  • 16:3516:35, 14 December 2022 diff hist +4,254 N Spamhaus HBLCreated page with "= Improve email Zimbra protection with Spamhaus HBL = In this article you will learn how to use Spamhaus Hash Blocklist (HBL) to improve email protection in Zimbra. For a lon..."

12 December 2022

6 December 2022

30 November 2022

29 November 2022

25 November 2022

8 November 2022

3 November 2022

26 October 2022

18 October 2022

11 October 2022

6 October 2022

3 October 2022

29 September 2022

26 September 2022

13 September 2022

7 September 2022

1 September 2022

31 August 2022

25 August 2022

24 August 2022

19 August 2022

28 July 2022

27 July 2022

26 July 2022

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