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Zimbra: A network service error has occurred

Software Effect Enterprises, Inc Posted on July 10, 2017 by SEEIJuly 10, 2017

You log onto the web interface on Zimbra web interface and you get the following dialog By default Zimbra uses DoSFilter Throttling Mechanism to avoid large number of request over a short period of time. So if the Zimbra server … Continue reading →

Posted in Zimbra 8

Clamav/Freshclam does not update on zimbra

Software Effect Enterprises, Inc Posted on May 15, 2017 by SEEIMay 15, 2017

Tested on Zimbra 8.7.7 You find the following in the /opt/zimbra/log/freshclam.log ClamAV update process started at Mon May 15 09:27:11 2017 main.cvd is up to date (version: 57, sigs: 4218790, f-level: 60, builder: amishhammer) WARNING: getpatch: Can’t download daily-23387.cdiff from … Continue reading →

Posted in Zimbra 8

Error! Attribute zimbraGalAccountId of domain SomeDomain.com references an invalid account ID: (some long hex number)

Software Effect Enterprises, Inc Posted on March 15, 2017 by SEEIMarch 15, 2017

If you get this message there is a good chance the GalSync account for the domain has been deleted. To correct this issue, you need to ssh to the zimbra server (or if you are running zimbra on multiple servers … Continue reading →

Posted in Zimbra 8

Zimbra Rejects Email From Some iPhone Clients

Software Effect Enterprises, Inc Posted on March 12, 2016 by SEEIFebruary 27, 2017

A user with an iPhone sends and email with an attachment to a recipient on a Zimbra server. The email is rejected and the following entry is made in the log: MarĀ  8 16:08:41 mx2 postfix/cleanup[20141]: 654AD251CD: reject: header Content-Type: … Continue reading →

Posted in Zimbra 8

Enable LDAPS support in Zimbra

Software Effect Enterprises, Inc Posted on October 12, 2016 by SEEIOctober 12, 2016

Enabling LDAPS at installation time To enable LDAPS at installation time, change the port used by the LDAP server in the installation menu from 389 to 636. Enabling LDAPS after installation Modify the URL used by LDAP on all servers, … Continue reading →

Posted in Zimbra, Zimbra 7, Zimbra 8

Specific Whitelist/Blacklist per IP for Zimbra

Software Effect Enterprises, Inc Posted on May 10, 2016 by SEEIMay 10, 2016

Edit /opt/zimbra/maps/postfix_black_white_list Add the following entries # a comment 5.5.5.5 REJECT Stop sending me spam 4.4.4.0/24 REJECT All your servers are compromised fubar.com REJECT I want no email from anyone@fubar.com .fubar.com REJECT I dont want email from your subdomains either … Continue reading →

Posted in Zimbra 8

Zimbra and modifying main.cf

Software Effect Enterprises, Inc Posted on May 3, 2016 by SEEIMay 3, 2016

There are a couple of customizations that can only be done by editting the /opt/zimbra/postfix/conf/main.cf file. The problem is, if you do any upgrades, you loose your changes. After being burned by this, I added this script to my servers … Continue reading →

Posted in Zimbra, Zimbra 8

Zimbra Encrypted PDF Files Flagged As Viruses

Software Effect Enterprises, Inc Posted on February 25, 2016 by SEEIFebruary 25, 2016

By default, emails with an encrypted PDF or archive (i.e. zip) attachment will be blocked by Zimbra’s antivirus program, ClamAV. The user will be notified by an email titled ‘VIRUS (Heuristics.Encrypted.PDF) in mail FROM….’ with a message containing ‘A virus … Continue reading →

Posted in Zimbra 8

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