The Mail tab includes the following preferences you can change.
Check for new mail every x. Select the polling interval, which is how often your computer checks for new email. The default is every 5 minutes. It is not good practice to change this to less than 5 minutes, as checking for email frequently causes a heavy load on the mail server and slows down the performance. If you are expecting an email, you can click Get Mail any time to receive new email immediately. If you select Never, you must click Get Mail on the toolbar to get new email.
When I click Get Mail. This sets whether or not your mailbox view changes when you click Get Mail.
If Run my default search is selected, when you click Get Mail, the mail search preference set in the Default Mail Search field is run. If your default search is not the folder you are viewing when you clicked Get Mail, your view is automatically redirected to the default folder view. In most cases, this is your Inbox.
If Update my current view is selected, when you click Get Mail from any folder view, the request to get new mail searches for updates to your current folder view and for new mail for other folders. Your current folder view does not change. If new mail is received to other folders, those folders are changed to bold and the number of unread messages is updated.
Display Mail. Select As HTML (when possible) to display messages with HTML formatting, for example bold, colored, otherwise styled text. Select As Text to display messages in plain text format. In plain text format, HTML tags are displayed, not applied as markup to the message.
Message Preview options
Display snippets of email messages. When on, the first line in the email is displayed when the cursor is over the subject of a message. When off, only the first few words of the message are displayed.
If Double-click opens messages in new window is enabled, when you double-click a message, it opens in a new window
Enable Images to download pictures automatically to your HTML email message. When this is enabled, you do not need to click the display image message to see the image.
When I read a message in the reading pane sets the behavior for marking messages that are viewed from the Reading Pane as read or unread. You can configure to have messages marked as read immediately, marked as read after a defined number of seconds of viewing a message in the Reading Pane, or to always leave messages that are viewed in the Reading Pane as unread.
After I move or delete a message sets the navigation behavior in the Content pane when reading messages.
Default Mail Search defines the search to execute when you log in. The results of this search are displayed in the Content pane when you log into your mailbox. The default search is your Inbox. Therefore, when you log in, the results of your Inbox display. You can change this field to have another folder, tag, or a saved search displayed when you first open the Zimbra Web Client. See Query language description for the syntax.
When a message arrives. When receiving a message you can set how you want to be notified: play a sound, flash the Mail tab, flash the browser title. See Setting up desktop alerts.
Forward a copy to. Specify an address to forward your email to. You can have the original email deleted from your Zimbra mailbox.
Specify whether to send an auto-reply message to incoming mail and set the start and stop date. This is frequently used as an away message or vacation message saying that you are out-of-office, and what the message should say. You can also specify a start and stop date for using this message. See Vacation message.
Read Receipt. Specify how to handle email messages you receive that are flagged to send a return read receipt message to the originator.
Configure the Messages from me section to handle messages you send that include your address as one of the recipients of the message or that are included in an address, such as a mailing list that includes you.
Spam Mail Options. You can identify up to 100 addresses that you always want to block messages from being added to your Inbox and 100 addresses you want to make sure are always added to your Inbox and not sent to Junk.
If you are set up to use a POP3 client, you can configure the POP access behavior when messages are downloaded to ZWC. The POP access options are
Allow all mail, including old mail, to be downloaded
Allow only mail from now (today's date) to be downloaded