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Zimbra webmail

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Also see the official Zimbra tutorial videos

Zimbra is a free, open source software webmail system that was developed by VMware of Palo Alto, California. In July 2013, it was sold by VMware to Telligent Systems and that company than changed its name to Zimbra, Inc. in September 2013. The webmail system continues to be actively developed.

Zimbra version 7 was extensively tested at NCF during 2011 and rolled out as NCF's new e-mail system in February, 2012. Zimbra replaced the old "Messenger Express" interface which was becoming unsupportable due to its age and also which did not support modern mobile devices, such as smart phones and tablets very well. On 5 February 2015 Zimbra version 7 was replaced by version 8, with the initial deployed version 8.6.0. Zimbra 8 introduces some minor interface improvements, new themes, as well as back-end efficiencies.

The Zimbra mail system provides many features not previously available at NCF. For a brief rundown of some of those features, read the Introduction to Zimbra page.

Accessing the Zimbra Web Client

The Zimbra Web Client can be accessed by clicking on Get Your NCF Webmail on the NCF Startpage.

The standard webmail features are all there - read, reply, compose new e-mail, and manage addresses. However, Zimbra has much more to offer.

There are three versions of Zimbra:

for users with slow connections such as dial-up (no spell-checking)
for users with highspeed (with spell-checking that can be enabled at Preferences→ Mail→ Composing→ Mandatory spellcheck)
for phones, tablets and other mobile devices using 3G and other phone networks for connection

You can select between standard and advanced versions at Zimbra Preferences→General→Login Options.

Zimbra8 advanced preferences client.png

Zimbra should automatically detect mobile devices and provide the mobile version to them. If it does not detect the device, try accessing Zimbra directly at https://mail.ncf.ca/.

Zimbra Mobile Log-in.png

Timing out

The NCF implementation of Zimbra is set to time out after 45 minutes of inactivity, meditated by cookies set on your computer. The time out feature is for security, so that an unattended computer won't compromise your email account.

Zimbra will automatically log you out if you open it in two or more different browser tabs at the same time. Instead of doing that you can have multiple Zimbra tabs open in one browser tab, such as having several emails under composition at once and you are able to click between them.

Help files

Zimbra includes a large number of built-in help files that explain many features and how they work, which can be found at "Help".

Zimbra8 help.png

Zimbra doesn't look right

If the Zimbra webmail interface doesn't look right, with elements overlapped, "squashed", interfering with each other, or just plain don't work then the problem is likely that you are using a very old browser, such as Internet Explorer 6, 7 or 8, Firefox 3 or similar old browsers. Zimbra has a modern web-standards-compliant interface and will only display properly in modern standards-compliant browsers.

Zimbra has been tested and works very well in the current versions of the following browsers:

All of these are recommended for use with Zimbra.

Testing with Internet Explorer 9, 10 and 11 has shown that these browsers don't always display properly even though Zimbra is standards compliant and IE9, 10 and 11 are supposed to be standards compliant browsers as well. According to member reports Zimbra 8 seems to work better with IE11, although it may be necessary to add https://mail.ncf.ca to "trusted sites" and also add it in ToolsCompatibility View as well.

If you are using IE9, 10 or 11 and and Zimbra doesn't display properly do try one of the browsers listed above - they are all free downloads.

Microsoft Internet Explorer 6 and other very old browsers

If you try to sign into Zimbra with an old web browser, such as Microsoft Internet Explorer 6 (IE6), which was first released on 27 August 2001, you will get a warning page like this:

Zimbra IE Warning.png

If you proceed anyway by clicking "Skip To Webmail" you will find that it loads the "standard" version and that many features don't work, like pane resizing. Also, in our testing, trying to use features, such as adding attachments, results in the browser crashing.

Zimbra in IE6:

Zimbra in IE6.png

NOTE: Due to a serious security vulnerability found on 14 February 2014 and described here no one should be using IE10 and earlier versions after that date.

Basically IE6 is too old a browser to use with modern webpages and services, such as Zimbra. Get a newer free browser, such as:

Missing Zimbra folders in Firefox

In December 2016 a new issue appeared where Zimbra's folders, usually displayed on the left side of the interface, had disappeared in Firefox. NCF's Sysadmin determined that the issue was the popular add-on, Privacy Badger, that many people use with Firefox. A new version of Privacy Badger, version 2016.12.8, seemed to be the culprit here and it was reported to the developers. An update to Privacy Badger on 16 December 2016 to version 2016.12.15.1 fixed this, but if it reoccurs it can be also temporarily fixed by disabling Privacy Badger.

I can't find my messages, or I can't see the message size!

Zimbra by default groups messages into conversations, just like Google's Gmail does. This is called "By Conversation" and can be confusing to people who have not used this before. In some cases, you won't see as much detail for each message.

In conversation view you can expand a conversation (collection of related e-mails) to see the individual e-mails, by just double clicking them. You can then restore them to a single conversation by clicking "Inbox" again. You can also show them by clicking on the arrow on the left side of the conversation to open the list of messages and then click the arrow again to collapse them. Conversation view actually works quite well once you get used to it.

If you are having trouble with conversation view, try changing the view to the more traditional "By Message" view.

Standard Client: Zimbra8 standard mail preferences.png

Advanced Client: Zimbra8 advanced view.png

Message size (in KB) is now shown in Zimbra for all messages when in "by message" view and single messages when in "by conversation" view. In "by conversation" view when a conversation consists of more than one message Zimbra will show the number of messages in brackets under "size". The message sizes can easily be seen in "by conversation" view by clicking the left arrow for the conversation, which expands to show each message and its size.

Zimbra8 advanced conversation.png


Zimbra enables a number of language choices at Perferences→General→Login Options.

Zimbra8 advanced language.png


The advanced version of Zimbra includes spell-checking, which can be selected on at Preferences→Mail→Composing→Mandatory spellcheck

Users with slow connections, using the standard version of Zimbra, who desire spell checking should use a browser that provides built-in spell checking, such as:

or basically any modern browser except Microsoft Internet Explorer and Microsoft Edge.

Zimbra8 advanced spellcheck.png

Contact and Calendar Sync

Zimbra provides CalDAV and CardDAV services for 2-way synchronization of contacts and calendars. This allows you to benefit from network-accessible calendars viewable in the Zimbra web client while still using your favourite native clients.

Examples of clients that support CalDAV (for calendar sync):

  • Mozilla Thunderbird (with the Lightning calender extension)
  • Mozilla Sunbird
  • Apple iCal
  • Apple iPhone, iPad, iPod
  • Evolution

Unfortunately, Microsoft Outlook does not include support for CalDAV. Windows users will need to use a specialized calendar app (eg. Mozilla Sunbird), or consider switching to Mozilla Thunderbird.

Examples of clients that support CardDAV (for contacts sync):

Client Configuration

Generally, the details are as follows.





Note that the final bit of the URL is important, it denotes the name of the Contact or Calendar folder. If you have a Contact folder named "Work", the URL would be:


If you have a Calendar named "Soccer Practice", the URL would be:

https://mail.ncf.ca/dav/ab123@ncf.ca/Soccer Practice

Step-by-step Instructions

Zimbra address book

Zimbra includes an address book with no limits on the number of addresses you can enter.

See Zimbra: Thunderbird Contacts for information on synchronizing lists of contacts in Thunderbird and Zimbra using the Zindus add-on for early versions of Thunderbird and the CardBook add-on for later versions of Thunderbird.

Importing contacts

Contacts can be imported into Zimbra from other e-mail clients quickly.

Save the contacts from your existing e-mail client in a common Comma Separated Variable (CSV) format, such as "Outlook Contacts". To import them into Zimbra go to Preferences→Import/Export→Import. From here you can click though to the CSV file, designate what type of file format it is in (ie "Outlook Contacts" format) and then which address book you want the contacts to go into, such as "Contacts".

You should note that some formats work better than others. For instance if you are exporting an address book from Gmail to import it into Zimbra, do not use "Google CSV format" as it will result in all your Zimra contacts having no names attached to them. Instead, export the contacts from Gmail in "Outlook CSV Format", and then import them into Zimbra as "Outlook Contacts".

Zimbra8 advanced import.png

Moving contacts

Every e-mail address that you exchange e-mail with will be automatically saved under "Emailed contacts". You can leave them there or transfer them to your "Contacts" address book by going to Address book→Emailed contacts→ Check name to be move→"Move selected item" (folder with arrow icon)→ select address book.

Zimbra8 advanced contact move.png

Deleting contacts

To delete contacts in Zimbra just go to Address Book→Emailed Contacts (or Contacts)→right click on the desired email address and select "delete". Alternatively you can also check the contact to be deleted and then click "delete".

Zimbra8 advanced contact delete.png

Sometimes when composing an email, Zimbra will suggest a contact that was once in your address book but has been deleted. These can be removed by hovering over the suggested name and clicking "forget", when that option appears.

If you don't want new contacts added to "Emailed Contacts"

By default Zimbra collects the addresses of new people who you send emails to to in "Emailed Contacts". If you don't want it to do this you can select it off at Preferences→Address Book→Options→uncheck: Add new contacts to "Emailed Contacts".

If you already have collected email addresses in "Emailed Contacts", you can delete them at Address Book→Emailed Contacts→Ctrl+A→Delete. You can also move all these contacts to you address book by selecting them all and them right click→Move→Contacts.

Zimbra8 advanced preferences contacts.png

Exporting contacts

You may want to export your contacts to install them in a different mail client, such as Microsoft Outlook, or just to back them up. You can export your contacts in Comma-Separated Variable (CSV) format by going to Preferences→Import/Export→Export" and then selecting what to export (contacts), format (for example Outlook Contacts) and then the source Contacts or Emailed Contacts. Note that the general selection of All Folders is inoperative and will produce an error "Not allowed to export from root folder for this type".

Zimbra8 advanced export.png

Composing an e-mail with formatting

E-mails can be composed in plain text or in HTML. HTML allows underlining, bold text, changing text size and font and other formatting to be used.

Advanced version

To select HTML as your default for composing an e-mail in the advanced version of Zimbra go to Preferences→Mail→Composing.

Zimbra8 advanced preferences composing.png

Standard version

To select HTML as your default for composing an e-mail in the standard version of Zimbra go to Preferences→Composing→Compose→As HTML.

Zimbra8 standard preferences composing.png

Adding addresses to a message

In Zimbra addresses can be added to an outgoing e-mail message by typing the address in manually or by clicking on "To", "CC" or "Show BCC" and then "BCC", which opens your address list and allows selecting the addresses.

Zimbra8 advanced addressing.png

Adding groups of addresses to a message

Adding a group of contacts to an e-mail is easy in Zimbra. First create a contact group, by going to Address Book→Emailed Contacts (or Contacts) and then select New→down arrow→Contact Group and complete the form to select members and name for your group. When composing an e-mail you may now select the group as if it were a single address, by clicking "To", "CC" or "BCC" in the e-mail.

Zimbra8 advanced contact group.png

Saving and sending drafts

Zimbra allows saving partially completed e-mails so you can work on them and send them later. When you are ready to save, just click "Save Draft". When you want to work on the e-mail again select the "Drafts" folder, double click on the e-mail and it will open for editing. When you are ready to send it just click "Send", or "Save Draft" again to continue working on it later.

Zimbra8 advanced draft.png

Adding attachments

Adding an attachment is very simple in Zimbra. In the message composition view just click on "Add Attachment" and select where the attachment is to be added from your computer, your briefcase or your contacts. When located click "attach" and the attachment will be sent with the e-mail.

Once attached, an attachment can be omitted from being sent with the e-mail by simply unchecking the attachment in the message composition view.

Zimbra8 advanced attach.png

Requesting e-mail receipts

E-mail receipts are generally not used anymore, but Zimbra does have the capability to request receipts from the person receiving the e-mail. To enable this for a specific e-mail being composed, while editing the e-mail go to Options→Down Arrow→Request Read Receipt.

Zimbra8 advanced read receipt.png

Using aliases

Zimbra allows sending from registered Email Alias. When composing a message simply click the down arrow under "from" and select which address Zimbra should show the message as coming from.

Zimbra 8 Using aliases.png

Using NCF disposable e-mail addresses

Disposable e-mail addresses that you create on the NCF website can then be managed in Zimbra from Preferences→Accounts.

Using NCF disposable e-mail addresses on Zimbra 8.png

Have Zimbra get your e-mail from other accounts

Zimbra can get your e-mail from your Gmail, Hotmail or other POP or IMAP accounts. You can set this up at Preferences→Accounts→Add External Account.

Of course you can always go into your external account and just it forward your mail from there to your NCF e-mail address as well.

Have Zimbra get your e-mail from other accounts on Zimbra8.png

Have Zimbra forward your e-mail

Zimbra can forward your e-mail to your Gmail, Hotmail or other mail accounts. You can set this up at Preferences→Mail→Message Arrival→Forward a copy to. You can also select "Don't keep a local copy of messages", if desired.

Forward mail in Zimbra 8.png

Changing your "from" name used in outgoing e-mail

Zimbra allows changing who the e-mail is from, so you can show only your first name, last name or any other text you like. To select this in Zimbra just go to Preferences→Accounts→Persona Settings and enter your preferred text.

Changing your "from" name used in outgoing e-mail on Zimbra 8.png


One of Zimbra's strongest features is its ability to find e-mail, people in your address book, briefcase items and other things using its built-in search function. No more manually poring though your inbox, sent message lists or trash for messages!

To search for something just enter the search term (for example, an e-mail address) in the search box on any page. Select where you want to search on the pull-down menus (All Item types, Mail, Contacts, Appointments, Files and can include shared items) and then click "search".

Searches you want to run again in the future can also be saved, by just clicking "save".

Zimbra8 advanced search.png

Searching for unread messages

Zimbra makes it easy to list your unread messages.

In the Zimbra mail search box enter "in:inbox is:unread" and this will show all unread messages in your inbox.

You can also click on 'Save' to save the search, and call it "Inbox Unread". Next time you want this search view, I just click on "Inbox Unread" under saved searches.

You can also just click on the search magnifying glass to access the Search window, and then check off the Basic Filters checkboxes to quickly filter by unread, or flagged, or whether the email has an attachment.

Additionally, you can access advanced filters which provide a high level of searching power to find messages you thought you'd lost!

Zimbra8 advanced search options.png


Downloading attachments

When an e-mail arriving in Zimbra includes an attachment this may be downloaded and then opened by reading the e-mail and then in that view at the top of the e-mail, between the addresses and the text, by clicking on "Download". You can also choose to "Remove" it from the e-mail or send it to the "Briefcase" for saving or sharing.

When there are multiple attachments, there will also be "Download all attachments" and "Remove all attachments" links.

Zimbra8 advanced download attachments.png

Zimbra indicates an attachment but the e-mail doesn't have one

Zimbra may sometimes indicate an attachment is present when the sender has embedded a small file in the e-mail, like an emoticon. When the receiver tries to locate the attachment it seems to be missing, but it is actually there, embedded in the e-mail. ;-)

In the example below Zimbra shows an attachment, but the e-mail only has embedded emoticons. Also because the e-mail contains no text, the "fragment" preview feature only shows [?] for each emoticon.

Zimbra indicates an attachment but the e-mail doesn't have one on Zimbra 8.png

Saving messages

NCF provides 5GB of storage with your e-mail account. For the average user this is probably enough for four months worth of mail, so you may want to keep some mail and delete other items. Some members have been storing mail they want to keep in their "Trash" file. The problem with doing this is trash is auto-deleted after 30 days. It may make more sense to save the e-mail that you want to keep in a new folder.

New folders are easy to create, just click on the new folder icon in the folder pane, as shown and then name it and decide where to put the new folder in relation to the existing folders. The illustration below shows where to click to create a new folder and shows a new custom folder that was created called "Archive".

By right clicking on any existing e-mail message you can select "Move" and send it to your new folder for safe keeping.

Saving messages on Zimbra 8.png

Exporting your e-mail

You can easily export some or all of your e-mail to your own computer, to free up space in your Zimbra account without losing your e-mail. You can export mail between certain dates this way as well.

To do this go to Preferences→ Import/Export→ Account→ Check Advanced settings→ Mail and then dates as desired→ Export. The file will be downloaded from your browser as a .tgz archive file which can be extacted and the individual .eml e-mail files read in any text editor.

Exporting email on Zimbra 8.png

Spam handling

The current NCF implementation of Zimbra has the spam control, found at Preferences→Mail, disabled so that e-mail messages will not be delivered to Junk folders, or otherwise blocked when sent through from NCF yellowmail.

Spam handling on Zimbra 8.png

Showing message headers

Headers for e-mail can give you a lot of information about where the e-mail came from, like its originating IP address. To see the raw MIME format text: mouse over the message title→right click→Show Original and the raw text and headers will open in a new text-only browser window.

Zimbra8 advanced show original.png

Vacation messages

Setting vacation messages is not recommended for security reasons. Complete information on this is found in the Tips (Email) article.

How much storage space are you using?

In Zimbra this is easy to see! Just "mouse-over" the place at the top where you name appears and it will display your quota and how much of it you are using, expressed in MB and as a percentage of space available.

Zimbra8 advanced usage.png

Deleting mail

Currently NCF provides 5GB of storage space for your email. When you use this up you will want to delete some old and large messages to make room for newer ones. The easiest way to do this is to sort the messages in each folder by size and then delete the largest ones, normally those with lots of attachments.

This is most easily accomplished by using the "Reading Pane At The Bottom" view, as it allows sorting by message size. This is the default view, but if you are using another view you can switch to this view at View→Reading Pane At The Bottom.

Once you have this view, sort by message size in each folder, by clicking Size and then selecting the arrow down to show largest at the top. The messages you want to delete can then be checked in the check-box on the left of the message line and deleted, by clicking delete.

To complete deleting email, you will need to check all the email folders you have and delete any messages desired. Mail in trash will be deleted automatically after 30 days, but to take advantage of the space freed up you will need to empty your trash right away.

Note: In some cases particular message threads cannot be deleted and just keep reappearing. If this occurs try changing the view from "by conversation" to "by message" and delete them in that view. Once deleted the view can be changed back.

Zimbra8 advanced sort by size.png

Deleting Large Messages

It is also convenient in Zimbra 8 to access Search and search by message size.

To do so:

Click on the Search magnifying glass on the right of the Search box, and then click on Size... is larger than... and then type in a size, say, 1000 KB, and hit enter. Zimbra will list all messages larger than 1000KB.

You may notice the search filters listed near the top, it will say something like:

Found 100+ results for: in:inbox larger:1000KB

If you click on the 'x' over "in:inbox" that will remove that filter. This may be helpful, if you want to find large messages across all folders, not just the inbox.

Zimbra8 advanced search size.png

Recovering deleted e-mail

E-mail that has been deleted from Zimbra or that has been taken off the server by a POP client can usually be recovered at Trash→right click→recover deleted items.

Zimbra8 advanced recover deleted.png

Mini calendar

By default Zimbra shows a mini calendar in its bottom left corner. If you want to turn this off you can at Preferences→Calender→Always Show the Mini Calender→uncheck.

Zimbra8 advanced minicalendar.png


Zimbra allows you to share files or access your own files remotely via a briefcase. For complete information see Zimbra: Briefcase.

Zimbra Limits at NCF

There are several limits you may encounter in your use of Zimbra.

  1. Mail storage size - members are allocated 5GB of storage. This contains all the mail and briefcase data. Members must manage their space within that limit. See how to check your storage space.
  2. Mail message size - a maximum of of 56MB per message is allowed. The actual file size of the attachment is 20-30% less as special encoding is required to send it via email. If you have large files that you wish to share, there are a number of other file sharing approaches that may be better than attachments. One of those is using the Zimbra Briefcase - see Zimbra: Briefcase.
  3. Sending rate - NCF limits the rate at which members can send out email to protect against spamming. A limit of 200 messages over a 4 hour span is in place. If you have large distribution lists that will exceed this, please contact the office - we have a solution.

I don't like the way Zimbra looks

Then change it. Zimbra 8 has 19 new colour themes you can choose from, ranging from dull and serious, to whimsical, to colourful, like the Hot Rod theme shown below. Next time you sign in Zimbra will remember your preferences and display your chosen theme.

To select a new theme go to Preferences→General→Login Options→Theme and chose one from the pull-down menu. They mostly look like what they sound like.

Incidentally, if you try them all and forget which one is the basic default theme, it is called Carbon.

Zimbra8 advanced theme.png

Why is it called that?

Rumour has it that Zimbra webmail and the Zimbra Collaboration Server is named for the Talking Heads song I Zimbra (video) and that the song is in turn an adaptation of Dada poet Hugo Ball's poem "Gadji beri bimba."

See also

Other pages with information about the Zimbra mail client:

External links